Where is a good chemistry website?

1.SDBS organic compound comprehensive spectrum database system/SIPO /sipo/zljs/default.htm

5. US Patent /dlib/defaults.asp

26. classic organic chemistry:/organizactions.htm

27. The website for online inquiry of reaction routes is a good place for organic synthesis!

http://www.stolaf.edu/depts/chem...tice/medialib/data/

These are all good!