Patent ID: 7122678

Claim:
A compound selected from: (trans)-(3,4-Dimethyl-cyclopentyldine)-acetic acid ethyl ester; (trans)-(3,4-Dimethyl-1-nitromethyl-cyclopentyl)-acetic acid; (+)-(trans)-7,8-Dimethyl-2-aza-spiro[4.4]nonane-3-one; (1-Nitromethyl-cyclopentyl)-acetic acid ethyl ester; (cic/trans)-(3R)-(3-Methyl-1-nitromethyl-cyclopentyl)-acetic acid ethyl ester; (cis/trans)-(7R)-7-Methyl-2-aza-spiro[4.4]nonane-3-one; (cis)-(3,4-Dimethyl-cyclopentylidene)-acetic acid ethyl ester; (trans)-3,4-Dimethyl-1-nitromethyl-cyclopentyl)-acetic acid ethyl ester; (trans)-7,8-Dimethyl-2-aza-spiro[4.4]nonane-3-one; (3-Benzyl-cyclopentylidine)-acetic acid ethyl ester; (cis/trans)-(3-Benzyl-1-nitromethyl-cyclopentyl)-acetic acid ethyl ester; (S,S)-7,8-Dimethyl-2-aza-spiro[4.4]nonane-3-one; (trans)-(7R)-7-Methyl-2-aza-spiro[4.4]nonane-3-one; and (R,R)-7,8-Dimethyl-2-aza-spiro[4.4]nonane-3-one.