Methyl 3-aminothieno[2,3-c]pyridine-2-carboxylate

Methyl 3-aminothieno[2,3-c]pyridine-2-carboxylate is identified by CAS 111042-91-2 and formula C9H8N2O2S. PubChem records CID 2764765, SMILES COC(=O)C1=C(C2=C(S1)C=NC=C2)N, and InChIKey VAAFWMASRDVMQF-UHFFFAOYSA-N. The former “carboxylic acid methyl ester” name is included verbatim among PubChem synonyms.

The fused thienopyridine framework contains one sulfur atom in the five-membered ring and one nitrogen in the six-membered ring. An amino group occupies position 3, beside the methyl carboxylate at position 2. The ester contributes two oxygens and its methyl carbon; the fused heteroaromatic system accounts for the remaining carbons and both ring junction descriptors. Formula C9H8N2O2S includes the exocyclic amino nitrogen as its second nitrogen. The ester methyl bonds through oxygen rather than directly to the fused-ring carbon. PubChem encodes one neutral component without a counterion or stereochemical layer. The bracketed fusion notation fixes how the two rings share atoms.

An inquiry should state CAS 111042-91-2 and preserve the complete fused-ring name. Include the requested amount, response contact, and any question about identity records. CID 2764765 or InChIKey VAAFWMASRDVMQF-UHFFFAOYSA-N can accompany a structure-led submission. Rlavie can compare those references with this exact amino ester entry. Standardizing “carboxylic acid methyl ester” to “methyl carboxylate” shortens the H1 while leaving the verified bonding and molecular form unchanged.