Patent ID: 7276613

Claim:
A compound of the formula: or a physiologically acceptable salt thereof, wherein: B is selected from C═O, and C═S; A is NH; R 1 is selected from n—C 5 H 10 D, n—C 6 H 12 D, n—C 7 H 14 D, and 1′1′-C(CH 3 ) 2 (CH 2 ) 5 CH 2 D, wherein D is selected from H, halogen, N 3 , NCS, OH, CN and —CH═CH—I; R 2 is selected from H, CH 3 , and (CH 3 ) 2 ; and R 3 is selected from CHE 2 , CH 2 E, CH═CH 2 , CH 2 OCH 3 , —C≡CH, —O(CH 2 )nCH 3 , —S(CH 2 )nCH 3 , —(CH 2 )nCH 2 E and wherein E is halogen and n and m are each independently a number from 0 to about 7, wherein X is selected from N and CH and Y and Z are each independently selected from (CH 2 ) p , O, N and S, and wherein p is a number from 0 to about 7, wherein X, Y and Z are each independently selected from CH and N, and wherein R4, R5 and R6 are each independently selected from hydrogen, halogen, N 3 , NCS, OCH 3 , CH 3 , CH 2 CH 3 , NO 2 , NH 2 and phenyl with the proviso that, if D is H, R 2 is H and B is C═O, then R3 cannot be a phenyl ring, an alkyl phenyl ring or a halogen substituted alkyl phenyl ring.