6,7-dimethoxy-1-methyl-3,1-benzoxazine-2,4-dione

3,4,5-tribromo-1-methylpyrazole

1-methylpyridin-1-ium-4-carboxylic acid,chloride

1-甲基-2-(1-丙炔基)-苯

4-羟基-2-甲基苯甲酸甲酯