1-Oxa-3,8-diazaspiro(4.5)dec-3-en-2-one, 4-ethyl-8-(1,2,3,4-tetrahydro-2-naphthalenyl)- 77306-11-7 Ethyl-4((tetrahydro-1,2,3,4-naphthyl-2)-1'-piperidine-4'-spiro)-5-oxazolidinone-2