OHOOHOOHOHR1R2OR3OOHOHOOR1713435OOH3CHO421 OOCCCOR2HOOHOHOHH1 6 7 OOHOHOOR1HOCCCHOOHOHOHH1 6 R2CH2OOHOOOCH3OH4 OHR1R222 H H23 CH HR3OHOOHOR4OOHHOOR1OOOOOMehR2HOOHHOHC(Me3)3HR3ginkgolide A OH H Hginkgolide B OH CH ginkgolide C OH CH ginkgolide M H OH ginkgolide J OH H OH HOHOHR1 R2 R3 OOOOMeOHOOHCMe3OHOM银杏叶萜内酯 白果内酯ntranacisaAtranan=019A=OH或A=RCOO 聚异戊烯醇RCOOHOHR=(CH2)7CH=CH(CH2)5CH3 m.p.4243，白果酸；R=(CH2)7CH2=CH2(CH2)5CH3 m.p.8688，氢化白果酸；R=(CH2)13CH2，m.p.8688，氢化白果亚酸；(CH2)7CH=CH(CH2)5CH3 ，b.p.237242/7mmHg;白果酚；OHOH(CH2)7CH=CH(CH2)5CH3 ，m.p.3637;银杏酚。HOHOOH(CH2)10CH3，4+烷基儿茶酚；
