Proceeding in a manner similar to that described in Example 2A above, substituting for the 3-(4-morpholinylmethyl)-4-amino-3,4-dihydro-2H-1,4-benzoxazine used therein a molar equivalent amount of 2-(1-piperidinylmethyl)-4-amino-5 3,4-dihydro-2H-1,4-benzoxazine, 2-(N,N-diethylaminomethyl)-4-amino-3,4-dihydro-2H-1,4-benzoxazine, 2-aminomethyl-4-amino-3,4-dihydro-2H-1,4-benzoxazine, 2-methylaminomethyl-4-amino-3,4-dihydro-2H-1,4-benzoxazine, 2-(4-thiomorpholinyl-methyl)-4-amino-3,4-dihydro-2H-1,4-benzoxazine, 2-(1-pyrrolidinylmethyl)-4-amino-3,4-dihydro-2H-1,4-benzoxazine, 2-(1-azetidinylmethyl)-4-amino-3,4-dihydro-2H-1,4-benzoxazine, 2-(4-methyl-1-piperazinylmethyl)-4-amino-3,4-dihydro-2H-1,4-benzoxazine or 2-[1-(hexahydro-4H-1,4-diazepinyl)methyl]-4-amino-3,4-dihydro-2H-1,4-benzoxazine, and substituting for the 5-(4-methoxyphenyl)-3,5-pentanedione used therein a molar equivalent amount of 4-(1-naphthyl)-2,4-butanedione, there can be obtained, respectively, 2-(1-piperidinylmethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine, 2-(N,N-diethylaminomethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine, 2-(aminomethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine, 2-(methylaminomethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine, 2-(4-thiomorpholinylmethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine, 2-(1-pyrrolidinylmethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine, 2-(1-azetidinylmethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine, 2-(4-methyl-1-piperazinylmethyl)-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine or 2-[1-(hexahydro-4H-1,4-diazepinyl)methyl]-5-methyl-6-(1-naphthylcarbonyl)-2,3-dihydropyrrolo[1,2,3-de]-1,4-benzoxazine.
