(2S,4S)-4-(tert-Butyl-dimethyl-silanyloxy)-5,5,8,8-tetramethoxy-2-(2-methyl-[1,3]dioxolan-2-yl)-1,2,3,4,5,8-hexahydro-naphthalen-2-ol

(S)-3-<1-(1,1-ethylenedioxy)ethyl>-1,2,3,4-tetrahydro-3-hydroxy-5,8-dimethonaphthalenone

1,2,3,4-tetrahydro-5,8-dimethoxy-4-oxo-2-acetyl-2-hydroxynaphthalene cyclic 4-(ethylene mercaptole)

(S)-1,2,3,4-tetrahydro-5,8-dimethoxy-4-oxo-2-acetyl-2-hydroxynaphthalene cyclic 4-(ethylene mercaptole), cyclic 2-ethyleneglycol ketal