heliomycin

== English == === Etymology === Probably from helio- +‎ -mycin (“antibiotic”). === Noun === heliomycin (uncountable) (pharmacology) A pentacyclic antibiotic 3,5,7,10-tetrahydroxy-1,1,9-trimethyl-2H-benzo(c,d)pyrene-2,6(1H)-dione.