8H-恶唑并[5,4-h]吡咯并[2,3-f]喹啉-5,7,9-三羧酸

2-(hydroxymethyl)-8H-oxazolo[5,4-h]pyrrolo[2,3-f]quinoline-5,7,9-tricarboxylic acid

L-缬氨酰基-L-丝氨酸

N-乙酰-L-丝氨酸

N,O-D-diacetyl serine