6,7-bis-(2-Methoxyethoxy)-quinazolin-4(3h)-one

6,7-bis-(2-Methoxyethoxy)-quinazolin-4(3H)-one (CAS 179688-29-0), offered by Beijing Lunarsun Pharmaceutical Co., Ltd. (which does not manufacture it directly), is one of the key Erlotinib intermediates, alongside related compounds such as 4-chloro-6,7-bis(2-methoxyethoxy)-4(3H)-quinazoline (CAS 183322-18-1) that the same supplier lists. It meets ChP standards; samples are not provided, and no specific sales markets are listed in the source data.