4-anilinocrotonic acid ethyl ester
(R)-(E)-ethyl 5-hydroxy-7-(4-methoxybenzyloxy)-6,6-dimethylhept-2-enoate
(R)-(E)-ethyl 5-cyclohexyl-5-hydroxypent-2-enoate
2-(cyclohexyl-hydroxy-methyl)-but-3-enoic acid ethyl ester
(R)-(E)-ethyl 5-hydroxy-5-(1-tosyl-1H-indol-3-yl)pent-2-enoate