17-Ethyl-6-hydroxy-9-(hydroxymethyl)-3,5,7,11,15-pentamethyl-19-(3-methyl-6-oxo-3,6-dihydro-2H-pyran-2-yl)-8-oxo-2,10,12,16,18-nonadecapentaenoic acid 2,10,12,16,18-Nonadecapentaenoic acid, 19-(3, 6-dihydro-3-methyl-6-oxo-2H-pyran-2-yl)-17-ethyl-6-hydroxy-9-(hydr oxymethyl)-3,5,7,11,15-pentamethyl-8-oxo- AIDS-160220 AIDS160220 LEPTOMYCIN B, 30-HYDROXY NSC364373