12,13-Dihydro-12,13-epoxyleucomycin V 3-acetate 4b,9-dipropanoate 35942-60-0 9-Propionylmaridomycin IV Leucomycin V, 12,13-dihydro-12,13-epoxy-, 3-acetate 4b,9-dipropanoate Propionylmaridomycin IV