2-ethyl-5,8-dihydroxy-3,6,7-trimethoxy-[1,4]naphthoquinone

nonan-5-one-hydrazone

1,4-dimethoxy-2,3-diisopropoxybenzene

2-ethyl-3-isopropoxy-4-hydroxy-4-(2',5'-dimethoxy-3',4'-diisopropoxyphenyl)-2-cyclobuten-2-one

2-ethyl-3,6,7-triisopropoxy-5,8-dimethoxynaphthalene-1,4-dione