((1R,2S,5R)-1,8,8-Trimethyl-4-oxo-bicyclo[3.2.1]oct-2-yl)-acetonitrile

1,5,11,11-tetramethyltricyclo<6.2.1.02,6>undec-5-en-7-one

1,5,5,11,11-pentamethyltricyclo<6.2.1.02,6>undecan-7-one

(1R,4S,5R)-5,8,8-Trimethyl-4-(3-oxo-butyl)-bicyclo[3.2.1]octan-2-one