methylThe univalent hydrocarbon radical, CH₃-, formally derived from methane by the loss of a hydrogen atom; a compound or part of a compound formed by the attachment of such a radical.
methylaluminationA chemical reaction involving the addition of a methyl group and an aluminum moiety to a substrate, typically an alkyne or alkene, resulting in the formation of organoaluminum compounds.
methylarginineAny methyl derivative of arginine, but especially 2-amino-5-[(N’-methylcarbamimidoyl)amino]pentanoic acid, which is an inhibitor of nitric oxide synthase
methylarsonateThe anion CH₃AsO₃²⁻, or any salt containing this ion
methylaseAny of several enzymes that catalyze methylation, especially of nucleic acids
methylcelluloseA white powdery substance, obtained by the methylation of cellulose, that swells in contact with water to form a gel; it has many industrial applications.
methylchloroformThe chloroalkane 1,1,1-trichloroethane, once produced industrially as a solvent, banned due to ozone layer effects.
methylchloroisothiazolinoneA synthetic preservative used in many cosmetics, personal care products and cleaners to stop bacteria, mold and fungi. It is effective at very low concentrations but is also a known cause of skin irritation and allergic contact dermatitis in some people. It is often used together with methylisothiazolinone.
methylcyclopentadieneAny of three isomeric cyclic diolefins, (methyl derivatives of cyclopentadiene), the organic precursor to the methylcyclopentadienyl-ligand commonly found in organometallic chemistry.
methylenedioxyA functional group with the structural formula R-O-CH₂-O-R', connected to the rest of a molecule by two chemical bonds.
methylenedioxyamphetamineA synthetic compound in the amphetamine family with a methylenedioxy group attached to its aromatic ring. It acts mainly by increasing the release of serotonin, dopamine, and norepinephrine in the brain, which leads to stimulant effects along with changes in mood, perception, and sensory experience.
methylenedioxybenzylamphetamineA synthetic organic chemical related to amphetamines. It has a benzene ring, a methylenedioxy group, and an amine side chain, but it is poorly studied and appears to have little psychoactive effect compared to compounds like MDA or MDMA.
methylenedioxybenzylpiperazineA synthetic psychoactive chemical in the piperazine family. It’s structurally related to BZP and contains a methylenedioxy group similar to MDMA, but its effects are generally weaker and less studied. It has mainly appeared as a designer drug or in counterfeit ecstasy tablets, and there is limited research on its safety and long-term effects.
methylenedioxycathinoneA synthetic cathinone drug and an entactogen of the phenethylamine and amphetamine families, with formula C₁₀H₁₁NO₃.
methylenedioxycyclopropylmethylamphetamineA synthetic organic compound related to MDMA and MDA with formula C₁₄H₁₉NO₂. It was created in research settings to study how small chemical changes affect similar drugs, but it has no known useful effects, medical use, or well-studied biological activity.
methylenedioxyethylamphetamineA synthetic psychoactive drug in the amphetamine family that increases serotonin activity in the brain, producing effects such as mild euphoria, emotional openness, relaxation, and altered sensory perception.
methylenedioxymethamphetamineA synthetic drug that affects brain chemicals involved in mood, energy, and social connection, often producing feelings of euphoria, emotional warmth, and increased empathy.
methylenedioxyphenethylamineA chemical compound in the phenethylamine family that has a methylenedioxy group on its benzene ring. It is structurally related to MDMA and MDA but lacks their psychoactive effects in humans because it is rapidly broken down in the body and does not strongly affect the central nervous system.
methylenedioxyphenolA functional group formed by a methylenedioxy group attached to a phenyl.
methylenedioxyphenylAny of a class of compounds in which a methylenedioxy group is connected to a phenyl, widely found in natural products, including safrole, and in drugs and chemicals.
methylenedioxyphenylpropylaminopentaneA synthetic, non-approved research compound belonging to the substituted phenethylamine/amphetamine-related class. It has been investigated in preclinical studies as a monoaminergic activity enhancer affecting neurotransmitter systems such as dopamine and norepinephrine. It has no approved medical use and very limited or no human clinical research data.