Rai B, Choudhary P. Synthesis and Characterization of Transition Metal Complexes of 2-(p-chlorophenyl)-4,5-Dimethyl (8H) Pyrimido [4,5-d] Pyrimidine Semicarbazone and Thiosemicarbazone . ajc [Internet]. 2010 Mar. 30 [cited 2024 Jul. 4];14(1):312-8. Available from: https://asianpubs.org/index.php/ajchem/article/view/22012