Synthesis and Biological Evaluation of [ 1,2,4 ] Triazolo [ 3,4-a ] phthalazine and Tetrazolo [ 5,1-a ] phthalazine Derivatives Bearing Substituted Benzylpiperazine Moieties as Positive Inotropic Agents .
O O O O O B-MAT I-MAT I-MAT I-MAT I-MAT I-MAT I-MAT I-MAT O B-MAT I-MAT I-MAT I-MAT I-MAT O O O B-MAT O O O O O O