?url_ver=Z39.88-2004&rft_id=10.1016%2FS0040-4039(02)00451-3&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Yabu%2C+K&rft.aulast=Yabu&rft.aufirst=K&rft.issue=16&rft.volume=43&rft.date=15+April+2002&rft.issn=0040-4039&rft.atitle=Studies+toward+practical+synthesis+of+(20S)-camptothecin+family+through+catalytic+enantioselective+cyanosilylation+of+ketones%3A+Improved+catalyst+efficiency+by+ligand-tuning&rft.title=Tetrahedron+Letters&rft.pages=2923+-+2926&rft.genre=article