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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ haling_smile: 金币+8 2013-04-28 14:22:30 gruyclewee: 检索EPI+1, 感谢应助,EPI奖励。 2013-04-28 20:30:54
你举得例子US 5541183
Ginkgolide derivatives and a process for preparing them
By: Park, Pyeong-Uk; Pyo, Sungsoo; Lee, Suk-Kwan; Sung, Jin Heung; Kwak, Wie Jong; Park, Hwa-Kun; Cho, Yong-Baik; Ryu, Geun-Ho; Kim, Taek Soo
Assignee: Sunkyong Industries Co., Ltd., S. Korea
10-(O-substituted alkyl)ginkgolide B derivs. and some 1,10-di-O-alkyl analogs were prepd. from ginkgolide B. The products are PAF inhibitors. Thus, ginkgolide B was converted to its 10-(3,4-dichlorobenzyloxy) deriv. which had an ED50 for inhibition of PAF-induced platelet aggregation of 1.01X10-7 M.
即:
Accession Number
1995:916489
CAN123:314213
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