Patent ID: 8883764

Claim:
A compound of Formula III: wherein, W, X, Y, and Z are null, or W, X, Y, and Z comprise a fused ring system selected from the group consisting of a benzene and a pyridine; A is selected from the group consisting of aryl, hydrogen, a C 1 -C 4 alkyl, halogen, benzyl, benzyloxy, and alkoxy; Q is an aldehyde or protected aldehyde; L is a linker selected from a C 1 -C 12 alkyl, aralkyl, and aryl, any of which is optionally substituted; wherein one or more methylene unit (CH 2 ) of said C 1 -C 12 alkyl is optionally replaced by any combination of oxygen, carbonyl(C═O), and NH; and R 1 and R 2 are independently selected from the group consisting of —NR 3 R 4 , halogen, C 1 -C 8 alkoxy, aralkoxy, alkenyloxy, alkynyloxy, and OCH 2 CH 2 CN; wherein R 3 and R 4 are independently a C 1 -C 4 , straight chain or branched alkyl group.