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jim5362
½ð³æ (ÕýʽдÊÖ)
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2Â¥2009-12-05 21:54:09
goodtimega
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jim5362(½ð±Ò+10,VIP+0):thank you very much 12-5 22:52
jim5362(½ð±Ò+10,VIP+0):thank you very much 12-5 22:52
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Carboxyl group with the Philippines rosin ring carbon atoms is connected to triple-ring structure on the carboxyl Philippines with steric hindrance. Under certain conditions, it is capable of participating in preparation of heterocyclic compounds reaction. Carboxyl reaction to the application of rosin into the ring is mainly through electrophilic addition, condensation, and a series of reactions to replace the corresponding heterocyclic compounds. Rosin resin acids in the Philippines through a series of rings can also be modified by heterocyclic compounds. At present, the study finds that rings are modified. The main feature is the formation of carboxy-lactone ring with the Philippines. 1.1 carboxyl-modified rosin-based heterocyclic compounds 1.2 construction of the Philippines into the ring hydrogenation of rosin-based heterocycles 1.3 carboxyl, hydrogenated rosin Central Philippines based heterocyclic compounds |
3Â¥2009-12-05 22:21:51














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