Synonyms: Spiro[16,18-methano-1H,3H,23H-[1,6,12]trioxacyclooctadecino[3,4-d][1]benzopyran-17(18H),2'-oxirane],verrucarin A deriv.; (4S,5R,10E,12Z,16R,16aS,17S,18R,19aR,23aR)-4,5,6,7,16,16a,19a,22-Octahydro-4-hydroxy-5,16a,21-trimethylspiro[16,18-methano-1H,3H,23H-[1,6,12]trioxacyclooctadecino[3,4-d][1]benzopyran-17(18H),2'-oxirane]-3,9,14-trione;Muconomycin; Muconomycin A; NSC 126728; NSC 200736; Spiro[16,18-methano-1H,3H,23H-[1,6,12]trioxacyclooctadecino[3,4-d][1]benzopyran-17(18H),2'-oxirane]-3,9,14-trione,4,5,6,7,16,16a,19a,22-octahydro-4-hydroxy-5,16a,21-trimethyl-,(4S,5R,10E,12Z,16R,16aS,17S,18R,19aR,23aR)-