Bicyclic 6 + 6 systems: the chemistry of pyrimido[4,5- d ]pyrimidines and pyrimido[5,4- d ]pyrimidines - RSC Advances (RSC Publishing) DOI:10.1039/C9RA05687D
Separation of 2-Amino-4,6-dihydroxypyrimidine on Newcrom R1 HPLC column | SIELC Technologies