Patent ID: 7507760

Claim:
A compound of the formula or the salts thereof, including all stereoisomeric forms thereof, wherein: X 1 is CR 3 or N; W is L 2 -A 3 or X 1 (A 1 )(A 2 ); each of L 1 and L 2 is a C 1 -C 10 optionally substituted alkylene or C 2 -C 10 optionally substituted alkenylene, wherein one or more said C is optionally replaced by a heteroatom selected from N, O or S, or further substituted with ═O, or both; each of A 1 , A 2 and A 3 is independently an optionally substituted 5-, 6- or 7-membered aliphatic or aromatic ring, and optionally fused to an additional aliphatic or aromatic ring; each R 1 is an optionally substituted alkyl (1-10C), alkenyl (2-10C), or alkynyl (2-10C), each optionally having one or more C, generally 1-4C, replaced by heteroatoms (N, O and/or S), or R 1 may be selected from aryl (5-12 ring members), arylalkyl (7-16C), and arylalkenyl (7-16C); R 2 is H or an optionally substituted alkyl (1-10C), alkenyl (2-10C), or alkynyl (2-10C), each optionally having one or more C, generally 1-4C, replaced by heteroatoms (N, O and/or S), or R 2 may be selected from aryl (5-12 ring members), arylalkyl (7-16C), and arylalkenyl (7-16C); and R 3 is H or an optionally substituted alkyl (1-10C), alkenyl (2-10C), or alkynyl (2-10C), each optionally having one or more C, generally 1-4C, replaced by heteroatoms (N, O and/or S), or R 1 and R 2 may be selected from aryl (5-12 ring members), arylalkyl (7-16C), and arylalkenyl (7-16C); n is 0-7; with the proviso that if L 1 is less than three linking atoms, R 2 cannot be hydrogen or L 1 must contain a C═O if R 2 is hydrogen; and with the further proviso that L 1 must contain at least three linking atoms if W is L 2 -A 3 .