alpha-Aminopimelic acid

Formula : C7-H13-N-O4
CAS : 3721-85-5 

Antagonizes glutamate-induced inhibitions of Helix neurones.

alpha-Amyrenone

Formula : C30-H48-O
CAS : 638-96-0 

From Marsdenia officinalis Tsiang.

alpha-Amyrin

Formula : C30-H50-O
CAS : 638-95-9 

A 5 ring triterpene derived from taraxasterol that differs from beta-amyrin in having the 29-carbon shifted to the 19 position.