OSI-420, Free Base (Desmethyl Erlotinib) Price Not Available 1mg OSI-420, Free Base (Desmethyl Erlotinib) Supplier Page Catalog Number R006030 Molecular Formula C21H21N3O4 CAS# 183321-86-0 Purity ≥95% Inchi InChI=1S/C21H21N3O4/c1-3-15-5-4-6-16(11-15)24-21-17-12-19(27-8-7-25)20(28-10-9-26-2)13-18(17)22-14-23-21/h1,4-6,11-14,25H,7-10H2,2H3,(H,22,23,24) Inchi Key KOQIAZNBAWFSQM-UHFFFAOYSA-N SMILES COCCOC1=C(C=C2C(=C1)N=CN=C2NC3=CC=CC(=C3)C#C)OCCO Size 1mg Supplier Page https://www.musechem.com/product/R006030.html