http://www.chemexper.com/   (欧化数据库)4 f! y- y! r1 R8 w
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http://www.chemblink.com/indexC.htm   （chemblink数据库）5 Y5 l% B& Z5 v$ B3 e  q
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http://chemfinder.cambridgesoft.com/  J, B" I% i/ T2 ?# Q! J

& m, x* _- M8 ?http://www.synchem.de   (特别数据库)
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" u% K( {" C% o7 |http://www.sigmaaldrich.com/catalog/search/AdvancedSearchPage   (Sigma Aldrich)   
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http://www.jkchemical.com/home.htm  (百灵威化学)
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http://www.acros.be/     (Acros Organics 化学品网)5 p& c9 A2 t; J$ R/ ^
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http://www.chemdat.de/mda/int_en/index.html   (安数库)
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http://webbook.nist.gov/chemistry/    (nist数据库,别名多), _3 V( L3 }( h, A9 y" v$ F
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http://www.colby.edu/chemistry/cmp/cmp.html    (有机化合物数据库)
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http://book.spousecare.com/book/    (外文文献服务网)

正需要的东西，感谢楼主的努力，谢谢分享