甘氨酰苯基丙氨酸

1-甲基-3,4-二氢-1H-苯并[e][1,4]二氮杂卓-2,5-二酮

2-(cyclohexylcarbamoylamino)acetic acid

{[(苄基氨基)羰基]氨基}乙酸

2-[(4-methylphenyl)carbamoylamino]acetic acid