Patent ID: 7119108

Claim:
A compound of the formula or a physiologically acceptable salt of the , wherein: R 1 is a branched or unbranched alkyl chain having the structure (CH 2 ) n Z where n is an integer from 1 to about 10 and Z is selected from H, halogen, N 3 , NCS, CN, OH, OCH 3 , NH 2 and CH═CH 2 ; R 3 is H or a branched or unbranched alkyl chain having the structure (CH 2 ) n CH 3 where n is an integer from 0 to about 3; R 4 , R 5 and R 6 are each independently selected from H, halogen, N 3 , NCS, OCH 3 , CH 3 , CH 2 CH 3 , NO 2 , NH 2 , phenyl or phenyl with at least one substituent selected from halogen, N 3 , NCS, OCH 3 , CH 3 , CH 2 CH 3 , NO 2 , and NH 2 ; and R 2 is selected from,