23344-17-4 6,9:23,24a-Dimethano-24aH-m-dioxino[4,5,6-st][4]benzazacycloheneicosine-7,11,26(10H,16H)-trione, 17,18,19,20,21,22,23,24-octahydro-5,17,19,21,25-hexahydroxy-24-(2-hydroxypropenyl)-23-methoxy-4,8,12,16,18,22,24-heptamethyl-, 24-acetate Dalacin C (Antibiotic 101a-3) NSC19990 STREPTOVARICIN C Streptovaricin complex, fraction c Streptovaricinoic acid, methyl ester