1-Oxa-7-azaspiro[4.5]decane hydrochloride

CAS 1415562-85-4 corresponds to 1-Oxa-7-azaspiro[4.5]decane hydrochloride, not the unqualified free base. PubChem records the salt as CID 73554221 with molecular formula C8H16ClNO. Its SMILES, C1CC2(CCCO2)CNC1.Cl, explicitly includes the chloride component after a dot. InChIKey UTGUXODPVYEHOY-UHFFFAOYSA-N identifies the same registered structure.

The spiro descriptor indicates two rings sharing one central atom. Numbers inside “[4.5]” count four atoms on one side and five on the other, giving a ten-member parent count after the shared center is included. Oxygen occupies position 1 in one ring, while nitrogen occupies position 7 in the other. Eight carbons form the remaining framework. The hydrochloride designation supplies chlorine and the additional hydrogen represented in C8H16ClNO, so the salt wording and formula are mutually consistent. The public record assigns no stereochemical layer.

Distinguishing the hydrochloride from 1-oxa-7-azaspiro[4.5]decane alone matters because removing the acid component changes both composition and registry identity. Here, the dot in the SMILES preserves that two-component representation rather than merging chloride into the carbon skeleton. CID 73554221 holds the salt-specific graph, CAS 1415562-85-4 points to the same form, and InChIKey UTGUXODPVYEHOY-UHFFFAOYSA-N gives a compact comparison value. The name, formula, and structural notation therefore align without ambiguity about ring size, heteroatom placement, or salt state.