1N substituted pyrazino[2,3-c]-1,2,6-thiadiazine 2,2-dioxides of formula I
 where:
   R₁ and R₂, which may be the same or different, are members of the group formed by hydrogen, straight or branched chain alkyl aryl, trifluoromethyl, halogen, oxo, amino, carboxamido and alkoxycarbonyl;
   R₃ is a member of the group formed by straight or branched chain alkyl, dialkylaminoethyl, aralkyl, alkoxycarbonylmethyl, carboxymethyl and hydroxyethyl; and
   R₄ and R₅, which may be the same or different, are members of the group formed by hydrogen, straight or branched chain alkyl and aralkyl, hydroxyalkyl, amino, aminoalkyl, alkylaminoalkyl; and a process for the preparation thereof.
                            式 I 的 1N 取代
吡嗪并[2,3-c]-1,2,6-噻二嗪 2,2- 二氧化物
 其中
R₁ 和 R₂ 可以相同或不同,均为氢、直链或支链芳基烷基、三
氟甲基、卤素、氧代、
氨基、羧酰胺基和烷氧羰基所组成的基团的成员;
R₃ 是由直链或支链烷基、二烷基
氨基乙基、芳基、烷氧羰基甲基、羧基甲基和羟基乙基组成的基团的成员;以及
R₄和 R₅(可以相同或不同)是由氢、直链或支链烷基和芳基、羟基烷基、
氨基、
氨基烷基、烷基
氨基烷基组成的基团的成员;及其制备方法。