Gefitinib Morpholine N-Oxide Catalogue G420563 CAS 847949-51-3 M.W 462.90 M.F C22H24CLFN4O4 Specifications FAQs N-(3-Chloro-4-fluorophenyl)-7-methoxy-6-[3-(4-oxido-4-morpholinyl)propoxy]-4-quinazolinamine