易混淆的单词： Salicin

1823 In italy the active ingredient is extracted from willow and named salicin .

1823年，在意大利，从柳树中提取出有用的成分，命名为水杨苷。

By 1897 a synthetic derivative ( acetyl salicylic acid ) of the plant 's active ingredient ( salicin ) was created .

1897年前后，一种从植物活性原料（水杨苷）中萃取出来的一种合成衍生物（乙酰基水杨酸）被研制出来。

The " spir " came from the spirea plant , which also produces salicin .

在“符号或者交互”来自斯皮雷亚工厂，也能制造酸。

However , when the active ingredient salicin was converted to the medicine salicylic acid it was hard to swallow , causing irritation to the lining of the mouth and stomach .

然而，当其中的有效成分水杨苷被制成药品后，很难吞服，因为它会引起嘴和胃部的强烈不适。