4-chloro-5,6,7-trimethoxyquinazoline

4-(2,3,4-三甲氧基苯甲酰基)吗啉

2,3-二羟基-4-甲氧基苯甲酸

methyl 2,3-dihydroxy-4-methoxybenzoate

methyl 2,3,4-trimethoxybenzoate