英文名称(1'R,2R,2'R,3a'R,3a1'R,4'R,6a'R,7a'S,11'S,11a'S,11b'R)-1',2',3a',4',11'-Pentahydroxy-8',11a'-dimethyl-1',3a',4',7',7a',11',11a',11b'-octahydro-2'H,5'H-spiro[oxirane-2,3'-[1,3a1](epoxymethano)dibenzo[de,g]chromene]-5',10'(6a'H)-dione分子式C20H24O10分子量424.4