“synthesis and characterization of 2-methoxy-6-phenyl-5h-pyrrolo[3,4-b]pyrazine-5,7(6h)-dione and 7-hydroxy-3-methoxy-6-phenyl-6,7-dihydro-5h-pyrrolo[3,4-b]pyrazine-5-one and some derivatives” (2017) International Journal of Pharmaceutical Chemistry, 7(8), pp. 121–130. doi:10.7439/ijpc.v7i8.4267.