Imidazo[1,2-b]pyridazin-6(5H)-one

Imidazo[1,2-b]pyridazin-6(5H)-one is the PubChem title linked to CAS 57470-54-9 and molecular formula C6H5N3O. PubChem assigns CID 15144435, SMILES C1=CC2=NC=CN2NC1=O, and InChIKey JPMJNVODBLZHLR-UHFFFAOYSA-N. The same official synonym set also contains 6-hydroxyimidazo[1,2-b]pyridazine and imidazo[1,2-b]pyridazin-6-ol, connecting the hydroxy wording with this standardized lactam record.

The fused bicyclic framework contains three nitrogen atoms and six carbon atoms. In the stored structure, oxygen is double-bonded at position 6 and the 5H designation identifies the corresponding nitrogen–hydrogen placement. That carbonyl representation is explicit in both the SMILES and standard InChI. Formula C6H5N3O contains no counterion or added solvent component. Because the hydroxy and 6(5H)-one labels occur as alternate tautomeric descriptions under the same CID, the H1 follows the PubChem title that most directly reflects the encoded graph. No salt form, positional isomer, or stereochemical variant is introduced by this standardization.

To reference this exact entry in an inquiry, include CAS 57470-54-9 and the complete imidazo[1,2-b]pyridazin-6(5H)-one name. State the quantity being considered, give suitable contact details, and note any identity-document questions. CID 15144435 or InChIKey JPMJNVODBLZHLR-UHFFFAOYSA-N can be checked when another source displays the 6-hydroxy synonym instead. Rlavie can rely on those structure references to associate both naming forms with the intended record while avoiding confusion with other imidazopyridazinone fusion patterns or a compound bearing oxygen at another ring position.