Geometric isomers 一定是 Diastereomers? - 考試

這裡一直覺得很納悶

因為我看筆記是抄:
Diastereomers=Geometric isomers
Enationmers=optical isomers

可是我去查有機課本:

Most diastereomers are either geometric isomers or compounds containing two
or more chirality centers ( usually asymmetric carbons).


所以意思是Geometric isomers包含在 diastereomers 裡嗎??
這兩個之間到底是什麼關係呀

請高手幫我解答 謝謝您


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