molecular formula造句

1、At last confirming the pigment was delphinidin-3-O-glucoside, the molecular formula is C21H21O12.
最后确定样品可能是飞燕草色素-3-葡糖苷，分子式为C21H21O12。

2、This is what the molecular formula means.
这就是此分子式的含义。

3、This is the molecular formula of diazine.
这是氯哒嗪的分子式。