Abstract: Described are oxobicyclononane derivatives and mixtures of same having the generic structure: ##STR1## wherein X, Y, X' and Y' each represents the moiety having one of the structures: ##STR2## wherein one of the dashed lines represents a carbon-carbon single bond and the other of the dashed lines represents a carbon-carbon double bond with the proviso that when X' and Y' are each the moiety: ##STR3## then the dashed line at the "2-3" position is a carbon-carbon double bond and the dashed line at the "6-7" position is a carbon-carbon single bond and one of X or Y has the structure: ##STR4## and the other of X or Y has the structure: ##STR5## and with the further proviso that when X and Y are the moieties: ##STR6## then the dashed line at the "6-7" position is a carbon-carbon double bond and the dashed line at the "2-3" position is a carbon-carbon single bond and one of X' or Y' has the structure: ##STR7## and the other of X' or Y' has the structure: ##STR8## and wherein R represents hydrogen, C.sub.1 -C.sub.

Abstract: Described are oxobicyclononane derivatives and mixtures of same having the generic structure: ##STR1## wherein X, Y, X' and Y' each represents the moiety having one of the structures: ##STR2## wherein one of the dashed lines represents a carbon-carbon single bond and the other of the dashed lines represents a carbon-carbon double bond with the proviso that when X' and Y' are each the moiety: ##STR3## then the dashed line at the "2-3" position is a carbon-carbon double bond and the dashed line at the "6-7" position is a carbon-carbon single bond and one of X or Y has the structure: ##STR4## and the other of X or Y has the structure: ##STR5## and with the further proviso that when X and Y are the moieties: ##STR6## then the dashed line at the "6-7" position is a carbon-carbon double bond and the dashed line at the "2-3" position is a carbon-carbon single bond and one of X' or Y' has the structure: ##STR7## and the other of X' or Y' has the structure: ##STR8## and wherein R represents hydrogen, C.sub.1 -C.sub.

Abstract: Described are oxobicyclononane derivatives having the generic structure: ##STR1## wherein R represents methyl or ethyl; wherein one of the dashed lines represents a carbon-carbon single bond or a carbon-carbon double bond; wherein N and P each represents 0 or 1 with the proviso that when N represents 1 the dashed line at the "2-3" position is a single bond with the sum of N and P being equal to 1 and uses thereof in augmenting or enhancing the aroma of perfume compositions, perfumed articles and colognes.