Skip to content A B C D E F G H I J K L M N O P Q R S T U V W X Y Z methylenedioxypyrovalerone A powerful synthetic stimulant drug in the synthetic cathinone family, chemically related to compounds like pyrovalerone. It acts mainly by blocking the reuptake of dopamine and norepinephrine, causing strong stimulation of the central nervous system. methylenediphenol The phenolic compound CH₂(C₆H₄OH)₂ or any derivative of this compound methylenetetrahydrofolate The substrate used by the enzyme methylenetetrahydrofolate reductase to generate 5-methyltetrahydrofolate (levomefolic acid). methylenic Containing a methylene group methylenimine Synonym of azomethine. methylenomycin Either of two cyclopentanoid antibiotics produced by Streptomyces bacteria. methylergometrine A synthetic analogue of ergonovine with oxytocic properties. methylergonovine methylergometrine methylerythritol A methyl derivative of erythritol, especially 2-C-methyl-D-erythritol, whose phosphate is involved in the biosynthesis of isoprenoids methylesterase Any esterase that catalyses the hydrolysis of a methyl ester methylesterification Esterification by means of a methanolic acid. methylesterify To subject to methylesterification. methylestradiol A semisynthetic steroidal estrogen used with normethandrone (methylestrenolone) for the treatment of menopausal symptoms. methylestrenolone Synonym of normethandrone. methylethylketone Synonym of butanone (CH₃CH₂COCH₃). methyleugenol A type of phenylpropanoid. methylfluorenyl Any methyl derivative of a fluorenyl radical methylfluorophosphonylcholine A highly toxic organophosphorus compound that combines a choline-like structure with a fluorophosphonate group and acts as an irreversible inhibitor of acetylcholinesterase, causing dangerous overstimulation of the nervous system. methylglucamine meglumine methylglucose Any O-methyl derivative of glucose but especially 2,4,5,6-tetrahydroxy-3-methoxyhexanal methylglutaconic Relating to methylglutaconic acid or its derivatives methylglutaric Relating to methylglutaric acid or its derivatives methylglyoxal The aldehyde form of pyruvic acid. methylglyoxalase The enzyme lactoylglutathione lyase. methylguanidinase A hydrolase enzyme that catalyzes the reaction of methylguanidine and water into methylamine and urea. methylguanine A methyl derivative of guanine. methylguanosine A methyl derivative of guanosine that is added to the "front" end of a eukaryotic messenger RNA shortly after the start of transcription. methylhexanamine 1,3-dimethylamylamine, a simple aliphatic amine used as a nasal decongestant and vasoconstrictor. methylhistamine Any N- or C- methyl derivative of histamine methylhistidine Any methyl derivative of histidine, but especially 3-methylhistidine which is found in contractile muscle methylhydrazine A hydrazine with an additional methyl group. methylia methylamine methylic Pertaining to, derived from, or containing methyl. methylide An anion or radical derived from methane by the removal of three hydrogen atoms. methylidene The CH₂= group in which the free valences are part of a double bond. methylidenyl Any substituted derivative of a methylidene radical methylidyne carbyne methylidynium The cation CH⁺, several isotopic forms of which exist in deep space methylimidazole Any of a class of compounds derived from imidazole through replacement of a hydrogen by a methyl group. methylimidazolium Any methyl derivative of the imidazolium cation. methylindole Any of a group of related compounds, including skatole. methylindolizidine Any methyl derivative of indolizidine methylisoborneol Any methylated derivative of isoborneol, but especially (1R,3R,4R)-3,4,7,7-tetramethylbicyclo[2.2.1]heptan-3-ol methylisocyanate A toxic organic compound with molecular formula CH₃NCO, an intermediate in the production of carbamate pesticides. methylisocyanide An organic compound of the isocyanide family, mainly used for making five-membered heterocyclic rings. methylisopropylthiambutene An opioid analgesic drug from the thiambutene family. methylisothiazolinone A powerful biocide and preservative within the group of isothiazolinones, used in shampoos etc. methylisothiazolone Any of various chemical compounds used as highly effective biocidal agents against fungal and bacterial species. methylisoxazole Any of three isomeric methyl derivative of isoxazole, many derivatives of which are used as pharmaceuticals methylitaconate Any salt or ester of methylitaconic acid. methylium The carbenium ion CH₃⁺ methylkaempferol Any methyl derivative of kaempferol methylketobemidone A particular narcotic painkiller. methylketol 2-methylindole, a mildly toxic and slightly flammable organic compound which occurs as a white solid and turns brown over time. methyllanthionine A particular thioether amino acid. methyllithium The binary organometallic compound CH₃Li that is used in organic synthesis methyllorazepam The drug lormetazepam. methyllycaconitine A particular toxic diterpenoid alkaloid found in many species of Delphinium (larkspurs). methyllycoctonine A diterpene alkaloid found in the genus Delphinium. methyllysine Any of three methylation products of the amino acid lysine that play a role in epigenetics. methylmagnesium The univalent organometallic radical CH₃Mg- that is a part of several Grignard reagents methylmaleimide Any methyl derivative of maleimide methylmalonate Any salt or ester of methylmalonic acid. methylmalonic Relating to methylmalonic acid or its derivatives methylmannose Any O-methyl derivative of mannose but especially (2S,3S,4R,5R)-2,4,5,6-tetrahydroxy-3-methoxyhexanal (an isomer of methylglucose) methylmannoside Any methyl glycoside / ether of mannose methylmercurial Of or pertaining to methylmercury; containing methylmercury. methylmercuric That contains a methyl group and a mercury atom. methylmercury The organometallic cation CH₃Hg⁺; it is a toxicant that accumulates in the environment in the form of various compounds methylmethaqualone A synthetic analogue of methaqualone with similar sedative and hypnotic properties. methylmorphine A methylated form of morphine. methylnaltrexone A peripherally-acting μ-opioid antagonist that acts to reverse some of the side effects of opioid drugs such as constipation without affecting analgesia or precipitating withdrawals. methylnaphthalene An aromatic hydrocarbon. methylnitronitrosoguanidine A synthetic mutagenic nitrosoguanidine compound used primarily in laboratory research to induce DNA mutations and study genetic processes. methyloclastic That splits off methyl groups methylogram A graphical representation of methylation methylol Synonym of methanol. methylome The set of nucleic acid methylation modifications in an organism's genome or in a particular cell. methylomic Relating to methylomes or to methylomics methylomics The study of methylomes methylone The entactogen and central nervous system stimulant 3,4-methylenedioxy-N-methylcathinone. methylorphine The orphine opioid 1-(1-(1-(p-tolyl)ethyl)piperidin-4-yl)-1H-benzo[d]imidazol-2(3H)-one. methylosome A cluster of proteins responsible for methylation methylotroph Any organism that uses simple methyl compounds (such as methane or methanol) as a source of carbon and of energy methylotrophic Pertaining to organisms that use, as substrates for growth, C1 compounds (e.g. methanol, methylamine, methane). methylotrophically In a methylotrophic manner. methylotrophy The condition of being methylotrophic methyloxidase Any enzyme that catalyses the oxidation of a methyl group (typically -CH₃ => -CH₂OH) methyloxy Synonym of methoxy. methylparaben A preservative and antifungal agent, the methyl ester of p-hydroxybenzoic acid. methylpentane Any methyl derivative of a pentane, but especially 2-methylpentane methylpentene Any methyl derivative of a pentene, but especially 4-methyl-1-pentene methylpentose The methyl ether of a pentose (O-methylpentose) methylpentynol A sedative drug with anticonvulsant effects, formerly used to treat insomnia. methylperone Melperone. methylphenethylamine Any of several isomeric C- or N- methyl derivatives of phenethylamine methylphenidate A stimulant used to treat attention deficit hyperactivity disorder and narcolepsy, better known by the trade name Ritalin methylphenobarbital A barbiturate drug used as a sedative, anxiolytic, and anticonvulsant. methylphenyl Any methyl derivative of a phenyl radical methylphosphonofluoridate Any of a class of highly toxic organophosphorus compounds characterized by the methylphosphonofluoridate chemical structure, including sarin and soman. They are potent cholinesterase inhibitors, often used as chemical weapons. methylpiperidinopyrazole A synthetic non-steroidal antagonist of ERα (estrogen receptor alpha), used in scientific research. methylpolysiloxane polydimethylsiloxane methylpotassium The binary organometallic compound CH₃K that is used in organic synthesis methylpred Methylprednisolone. methylprednisolone A synthetic glucocorticoid, C₂₂H₃₀O₅, used chiefly in the treatment of inflammatory and autoimmune disorders. methylprogesterone Any of several methyl derivatives of progesterone, but especially 6-methylprogesterone that is an androgenic progestin methylpropane isobutane methylpropanol isobutanol (2-methylpropan-1-ol) methylpropanone Synonym of butanone. methylpropene isobutylene. methylpropylthiambutene An opioid analgesic drug from the thiambutene family. methylprotodioscin A particular steroid glycoside. methylprotogracillin A particular steroid glycoside. methylpunicine Synonym of methylpelletierine. methylpurine Any of several isomeric methyl derivatives of purine, but especially 6-methylpurine which is an anticancer agent methylpyrazine Any methyl derivative of pyrazine methylpyridazine Any methyl derivative of pyridazine methylpyridine Any of three isomeric methyl derivatives of pyridine methylpyridinium Any methyl derivative of a pyridinium ion methylquinoline Any methyl derivative of quinoline methylsalycylate A salt or ester of methylsalycylic acid. methylscopolamine A methylated derivative of scopolamine, used (usually as the bromide salt) as an oral medication to treat peptic ulcers, stomach or intestinal spasms, excessive salivation, and motion sickness. methylserotonin Any of several methyl derivatives of serotonin that are agonists methylsilane Any organic silane that has a methyl group directly bonded to a silicon atom, but especially the simplest silane CH₃-SiH₃ methylsiloxane Any siloxane of general formula [SiO₂CH₃]ₙ methylsilsesquioxane Any methyl derivative of silsesquioxane. methylsodium The binary organometallic compound CH₃Na that is used in organic synthesis methylsulfate dimethyl sulfate methylsulfenamide Any methyl derivative of sulfenamide methylsulfonate Synonym of methanesulfonate. methylsulfonyl The radical CH₃SO₂- derived from methanesulfonic acid methylsulfonylmethane An organosulfur compound with the chemical formula (CH₃)₂SO₂. methyltestosterone An anabolic steroid that is a methyl derivative of testosterone C₂₀H₃₀O₂, used to treat testosterone deficiency in men and breast cancer and menopause in women. methyltetrahydrocarbazole A methyl derivative of tetrahydrocarbazole. methyltetrahydrofolate A tetrahydrofolate with a methyl substituent, a key natural form of folate. The chief form is 5-methyltetrahydrofolate. methylthio The radical CH₃S- analogous to the methoxy group methylthiobutylglucosinolate Synonym of glucoerucin. methylthiolation Reaction with a methylthio group methylthioninium The heterocyclic cation 3,7-bis(dimethylamino)-phenothiazin-5-ium, which is the basis of methylene blue methylthiotransferase Any enzyme that catalyses the transfer of a methylthio group methylthiouracil A thioamide, closely related to propylthiouracil, used as an antithyroid preparation. methylthiourea Any methyl derivative of thiourea. methyltoxoflavin Any methyl derivative of toxoflavin, especially 1,3,6-trimethylpyrimido[5,4-e][1,2,4]triazine-5,7-dione methyltransferase Any enzyme that catalyzes transmethylation methyltrichlorosilane The organosilicon compound CH₃SiCl₃ used in the manufacture of siloxanes methyltrienolone The androgen metribolone methyltriethoxysilane The organic silane CH₃Si(OCH₂CH₃)₃ methyltrioxorhenium The organometallic compound CH₃ReO₃ that is used as an oxygen transfer catalyst methyltriphenylphosphonium The phosphonium cation (C₆H₅)₃.CH₃P⁺ methyltryptamine A psychedelic alkaloid obtained from the leaves of several plants