Patent ID: 8318928

Claim:
The compound having the formula (II): wherein X is CR 1 ; and Y is S; R 1 is hydrogen; R 3 is hydrogen, alkali (including lithium, sodium, or potassium), or substituted or unsubstituted alkyl; R 4 is substituted or unsubstituted alkyl, haloalkyl, cyanoalkyl, aryl, heteroaryl, heterocyclyl; or R 3 and R 4 , together with the nitrogen atom to which they are attached, may form an optionally substituted 4 to 12 membered cyclic ring; which cyclic ring may be heterocyclyl or heteroaryl; and R a and R b , which may be same or different, are each independently hydrogen, substituted or unsubstituted alkyl, haloalkyl, cyanoalkyl, cycloalkyl, cycloalkylalkyl or alkoxyalkyl; or pharmaceutically acceptable salt thereof.