圖片參考:http://imgcld.yimg.com/8/n/AC00773147/o/701204170059413873395140.jpg
有d compund 好似呢個咁有好多個ring
我唔識點睇有冇chiral carbon
究竟呢類compound 要點睇有冇optical activity?
更新1:
sorry打錯左 上面個compound 係optically inactive