2,4-Dichloro-7-tosyl-7H-pyrrolo[2,3-D]pyrimidine934524-10-430 % similar 3,6-Dichloro-1,2,4,5-tetrazine106131-61-730 % similar 4,6-Dichloro-2-methylpyrimidine-5-carbaldehyde14160-91-930 % similar 2,5-Dichloro-3-methylpyridine59782-88-630 % similar