89015-90-7

(4Z,10Z,12Z,16S,16aS,17S,18S,19aR)-5,16a,21-trimethyl-6,7,16,16a,22,23-hexahydro-3H,18H,19aH-spiro[16,18-methano[1,6,12]trioxacyclooctadecino[3,4-d]chromene-17,2'-oxirane]-3,9,14-trione