A typical production method of a compound (10 g), which is the compound represented by the formula (Ia), wherein Y is an oxygen atom, a sulfur atom or a group represented by the formula ???NRY??? (wherein RY represents a hydrogen atom or a C1-6 alkyl group), X1 is a group represented by the formula ???C(CN)???, X2 is a group represented by the formula ???CH???, R2 is a hydrogen atom, R3 is a hydro