硫酸二甲酯 、
4,5,6,7-tetrachloro-2',3',6',7'-tetrahydroxy-spiro[phthalan-1,9'-xanthen]-3-one 、 alkaline earth salt of/the/ methylsulfuric acid 生成 4,5,6,7-tetrachloro-3',6'-dihydroxy-2',7'-dimethoxy-spiro[phthalan-1,9'-xanthen]-3-one 、 4,5,6,7-tetrachloro-3'-hydroxy-2',6',7'-trimethoxy-spiro[phthalan-1,9'-xanthen]-3-one