Benzophenone后面的数字-1，-2等代表什么

* Benzophenone-1 (2,4-dihydroxybenzophenone)
* Benzophenone-2 (2,2',4,4'-tetrahydroxybenzophenone)
* Benzophenone-3 (oxybenzone)
* Benzophenone-4 (sulisobenzone)
* Benzophenone-5 (sulisobenzone sodium)
* Benzophenone-6 (2,2'-dihydroxy-4,4'-dimethoxybenzophenone)
* Benzophenone-7 (5-chloro-2-hydroxybenzophenone)
* Benzophenone-8 (dioxybenzone)
* Benzophenone-9 (sodium 2,2'-dihydroxy-4,4'-dimethoxybenzophenone-5,5'-disulfonate)
* Benzophenone-10 (mexenone, 2-hydroxy-4-methoxy-4'-methyl-benzophenone)
* Benzophenone-11 (benzophenone-2 and benzophenone-6)[1]
* Benzophenone-12 (octabenzone, used to protect plastics)