According to this invention, there is provided a novel 4,8 dimethylbicyclononane derivative represented by the formula : ##STR2## wherein one of X and {HEAD ~ Y} represents a hydroxyl group, a straight or branched alkoxy group having 1 to 5 carbon atoms or an acyloxy group having 2 or 3 carbon atoms and the other represents a hydrogen atom, or 57 jointly represent an oxo group ; and a dotted line represents optional presence of {TAIL ~ a double bond} 
According to this invention , there is provided a novel 4,8 dimethylbicyclononane derivative represented by the formula : # # STR2 # # wherein one of X and { HEAD ~ Y } represents a hydroxyl group , a straight or branched alkoxy group having 1 to 5 carbon atoms or an acyloxy group having 2 or 3 carbon atoms and the other represents a hydrogen atom , or 57 jointly represent an oxo group ; and a dotted line represents optional presence of { TAIL ~ a double bond }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL