1,2,4-Triazolo(3,4-a)phthalazine, 3-(4-chloro-3-nitrophenyl)-6-(1-pyrrolidinyl)- 3-(4-Chloro-3-nitrophenyl)-6-(1-pyrrolidinyl)-1,2,4-triazolo(3,4-a)phthalazine 87540-12-3 BRN 6447192