4,6-Dichloropyrimidine-5-carboxylic acid87600-98-431 % similar 2,5-Diethylpyrazine13238-84-130 % similar 4-Chloro-6,7-dimethoxyquinazoline13790-39-130 % similar 2,4,5,6-Tetrachloropyrimidine1780-40-130 % similar 4-Chloro-5H,6H,7H-pyrrolo[2,3-d]pyrimidin-6-one346599-63-130 % similar