Reductase active only on small flexible lipophilic carbonyls. No activity with cyclic monoterpenes, tropinone, nitrogen-containing tropinone analogs, tropine or pseudotropine as substrate. kcat is 0.34 sec(-1) for NADH. kcat is 0.000003 sec(-1) for NAD. Belongs to the short-chain dehydrogenases/reductases (SDR) family. SDR65C subfamily.