1,2,4-Triazolo(3,4-a)phthalazine, 3-methyl- (9CI) 20062-41-3 3-Methyl-s-triazolo(3,4-a)phthalazine 3-Methyltriazolophthalazine NSC 116346 S-Triazolo(3,4-a)phthalazine, 3-methyl-