6,11-dimethoxy-8-(2-methyl-1,3-dithiolan-2-yl)-7,8,9,10-tetrahydrotetracene-5,12-dione

2-acetyl-6-bromo-5,8-dimethoxynaphthalene

2-(氯羰基)苯甲酸甲酯

(R)-(-)-(S-1-hydroxyethyl)-2-hydroxy-5,8-dimethoxy-1,2,3,4-tetrahydronaphthalene