105563-53-9

(6Z,8Z)-23-hydroxy-5-(1-hydroxyethyl)-1a,12a,17-trimethyl-2,3,12,12a,18,19-hexahydro-1aH,14H,15aH-spiro[12,14-methanooxireno[8,9][1,6,12]trioxacyclooctadecino[3,4-d]chromene-13,2'-oxirane]-10,22(5H,22aH)-dione