60538-74-1 6,7,16,16a,19a,22-Hexahydro-9-(1-acetoxyethyl)-25-acetoxy-16a,21-dimethylspiro[5,9:16,18-dimethano-3H,23H-[1,6,12]trioxacyclooctadecino[3,4-d][1]benzopyran-17(18H),2-oxirane]-3,14(9H)-dione 60545-11-1 4,9,14-Trioxatetracyclo[11.1.0.03,5.08,10]tetradecane,1,6,6,10-tetramethyl-, (1R*,3S*,5S*,8S*,10S*,13R*)-(?à)-