analysis of the sialic acids by capillary gas-liquid chromatography combined with mass spectrometry ( glc-ms ) revealed the occurrence of n-acetylneuraminic acid ( neu5ac ) , n-acetyl-9-o-acetylneuraminic acid ( neu5,9ac2 ) , n-acetyl-7,9-di-o-acetylneuraminic acid ( neu5,7,9ac3 ) , n-acetyl-9-o-lactylneuraminic acid ( neu5ac9lt ) and n-glycolyneuraminic acid ( neu5gc ) .
C0037025
sialic
C0067762
n-acetylneuraminic acid