| INTERMEDIATE | |
| Chemical Name | CAS RN |
| Erlotinib hydrochloride intermediate | |
| Ethyl 4,5-bis(2-methoxyethoxy)-2-nitrobenzoate | 179688-26-7 |
| 2-Amino-4,5-bis(2-methoxyethoxy)benzoic acid ester | 179688-27-8 |
| 6,7-Bis(2-methoxyethoxy)quinazolin-4-(3H)-one | 179688-29-0 |
| 4-Chloro-6,7-(2-methoxyethoxy)-quinazoline | 183322-18-1 |
| 3,4-bis(2-Methoxyethoxy)benzonitrile | 80407-68-7 |
| 4,5-bis(2-Methoxyethoxy)-2-nitrobenzonitrile | 236750-65-5 |
| 4,5-bis(2-Methoxyethoxy)-2-nitrobenzamide | 1172625-04-5 |