( 2 ) the labelled acid-soluble derivatives were separated by ion exchange columns and characterized by chromatography and electrophoresis , and were identified as glucosamine , glucosamine 6-p , n-acetylglucosamine , n-acetylmannosamine , n-acetylneuraminic acid , n-acetylglucosamine 6-p , n-acetylglucosamine 1-p , n-acetylmannosamine 6-p , udp-n-acetylglucosamine , udp-n-acetylgalactosamine .
C0017718
glucosamine
C0001056
n-acetylglucosamine