Patent ID: 7767827

Claim:
A pyrazole-1-carboxylate derivative of a general formula (I), wherein R 1 is a hydrogen atom or an optionally substituted alkyl group having 1 to 6 carbon atoms, R 2 is a hydrogen atom, R 3 is an optionally substituted alkyl group having 1 to 6 carbon atoms and R 4 is a hydrogen atom, an optionally substituted phenyl group or an optionally substituted pyridyl group, provided that the case of R 3 being an ethyl group is excluded when R 2 and R 4 are hydrogen atoms and R 1 is a methyl group, when R 2 and R 4 are hydrogen atoms and R 1 is a propyl group or when R 2 is an ethyl group, R 4 is a hydrogen atom and R 1 is a methyl group.