The story
From [Term?] + -mycin (“antibiotic”).
Etymology from Wiktionary, CC BY-SA 4.0.
porfiromycin
Today it means: An antineoplastic antibiotic, [(4S,6S,7R,8S)-11-amino-7-methoxy-5,12-dimethyl-10,13-dioxo-2,5-diazatetracyclo[7.4.0.02,7.04,6]trideca-1(9),11-dien-8-yl]methyl carbamate. Full definition →