p. 4347 - 4353
(2007/10/02)((1R,4aR,8aR)-7-Methoxy-8a-methyl-5,8-dioxo-1,4,4a,5,8,8a-hexahydro-naphthalen-1-yl)-acetic acid
((1R,4aS,8aR)-7-Methoxy-8a-methyl-5,8-dioxo-1,4,4a,5,8,8a-hexahydro-naphthalen-1-yl)-acetic acid
((1R,4aR,8S,8aR)-8-Hydroxy-7-methoxy-8a-methyl-5-oxo-1,4,4a,5,8,8a-hexahydro-naphthalen-1-yl)-acetic acid
((1R,4aS,8S,8aR)-8-Hydroxy-5,8a-dimethyl-7-oxo-1,4,4a,7,8,8a-hexahydro-naphthalen-1-yl)-acetic acid