(1R,2S,5R,8S)-5-benzyl-1,5,11,11-tetramethyl-3-oxa-6-azatricyclo[6.2.1.02,7]undec-6-en-4-one

(1R,2S,5S,8S)-5-allyl-5-benzyl-1,11,11-trimethyl-3-oxa-6-azatricyclo[6.2.1.02,7]undec-6-en-4-one