| 摘要 |
The present invention relates to pyrimidobenzodiazepine derivatives of the formula (I) and 2-(N-acetoacetal)aminobenzodiazepine derivatives of the formula (II), which compounds have the following formulas: <IMAGE> +TR <IMAGE> wherein R1 represents a hydrogen atom or a lower alkyl group, R2 represents a hydrogen atom, a lower alkyl group or an aryl group, and rings A and/or B are unsubstituted or substituted by one or more of a halogen, nitro, trifluoromethyl, lower alkyl or lower alkoxy group; including the cases wherein the nitrogen atom at the 6-position of the compound (I) or the 4-position of the compound (II) may be in the form of N-oxide and wherein compound (I) may be in the form of a pharmaceutically acceptable acid addition salt thereof. The present invention also relates to a method of producing these compounds. The compounds (I) and (II) are useful as muscle relaxants, anticonvulsants, sedatives, tranquilizers, etc.
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