Appeal No. 1997-1390 Application 08/443,616 substituent group, which may be CH , on each naphthyl ring, whereas Cai discloses 3 hydrogen atoms. This is illustrated in the formulas below: Claim 16 (R' may be CH ) 3 Cai 5Page: Previous 1 2 3 4 5 6 7 8 9 NextLast modified: November 3, 2007