A cyclobutane ring and a cyclohexane ring share one carbon. An -OH group is on the cyclobutane carbon adjacent to the shared atom, and a chlorine atom is on the cyclohexane carbon adjacent to the shared atom. The IUPAC name is

The descriptor is [3.5] (smaller ring first). Numbering begins at a small-ring atom next to the spiro atom, giving the principal group (OH) the lowest locant: C-1 = the carbinol carbon, C-2, C-3, spiro C-4, then C-5 onward in the six-membered ring. The chlorine carbon next to the spiro atom is C-5 (lowest choice). Alphabetical prefix chloro precedes the suffix ol: 5-chlorospiro[3.5]nonan-1-ol.