(1R,2S,5R,6R,7S)-5-Butyl-4-oxa-tricyclo[5.2.1.02,6]dec-8-en-3-one

(1S)-1-[(2'S,3'R)-3-hydroxymethylbicyclo[2.2.1]hept-5-en-2-yl]pentan-1-ol

(2R,5S,6S)-5-butyl-4-oxatricyclo[5.2.1.02,6]dec-8-en-3-one

(2R,5R,6S)-5-butyl-4-oxatricyclo[5.2.1.02,6]dec-8-en-3-one