Best Bet
Reference, substance, reaction and supplier content plus relevance-ranked results, step-by-step procedures and protocols, citation mapping, biosequence searching, retrosynthetic analysis, patent landscape mapping, touch-screen enabled structure drawing and much more.
Registration is needed to use. To register visit https://scifinder.cas.org/registration/index.html?corpKey=15D31E47X86F35055X190A9C1E25AE9C01A7