Patent ID: 8859606

Claim:
A compound having the following formula wherein R 1 is selected from the group consisting of OR 7 , N(R 7 ) 2 , and N(R 7 )SO 2 R 7 wherein R 7 is selected from the group consisting of H, alkyl and aryl, wherein said alkyl and aryl may be substituted with fluoro; R 2 is selected from the group consisting of H and alkyl; R 3 is selected from the group consisting of H and alkyl; wherein R 2 and R 3 together can form a cycloalkyl ring; X is (CH 2 ) n wherein n is 0 or an integer of from 1 to 3; provided however that when n is 0 or 1, R 1 is not OR 7 ; R 4 is selected from the group consisting of H, alkyl and fluoroalkyl; R 5 is selected from the group consisting of H, hydroxy, alkyl, aryl, alkoxy, aryloxy, halogen, nitro, amino, cyano, hydroxy, halogen, nitro, amino and cyano-substituted alkyl, aryl, alkoxy or aryloxy; R 6 is selected from the group consisting of H, hydroxy, alkyl, aryl, alkoxy, aryloxy, halogen, nitro, amino, cyano, hydroxy, halogen, nitro, amino and cyano-substituted alkyl, aryl, alkoxy and aryloxy; Z is (CH 2 ) m wherein m is 0 or an integer of from 1 to 3; Y is selected from the group consisting of O, S, SO, SO 2 and (CH 2 ) p , wherein p is 0 or an integer of from 1 to 3; and W is selected from the group consisting of alkyl, aryl, benzylyl and halogen-substituted benzyl.