3-((R)-6-Methyl-1,4-dioxa-spiro[4.4]non-6-yl)-cyclohexa-1,4-dienecarboxylic acid methyl ester

(E)-3-((R)-6-Methyl-1,4-dioxa-spiro[4.4]non-6-yl)-acrylic acid methyl ester

3-((S)-4-Methyl-spiro[2.4]hept-4-yl)-benzoic acid methyl ester

3-((S)-1-Methyl-2-methylene-cyclopentyl)-benzoic acid methyl ester

(E)-3-((R)-6-Methyl-1,4-dioxa-spiro[4.4]non-6-yl)-prop-2-en-1-ol