1,4-benzoxazine derivatives, their production and use

Abstract From the Canadian patent

1,4-Benzoxazine Derivatives, their Production and Use Abstract of the Disclosure, 1,4-Benzoxazine derivatives representable by the general formula;, wherein, R1 and R2 independently stand for hydrogen halogen atom, nitro group, an optionally substituted lower alkyl group, an optionally substituted amino group, an optionally substituted hydroxyl group a, lower alkoxycarbonyl group, or, R1 and R2 combinedly stand for a ring representable by ?CH2?m (wherein m denotes an integer of 3 to 5) or -O?CH2?nO- (wherein n denotes an integer of 1 to 3), R3 stands for hydrogen or a lower alkyl group R4 and R5 independently stand for hydrogen halogen atom, an optionally substituted lower alkyl group or an …