Neu5Ac (blue), 2,7-anhydro-Neu5Ac (orange), or XY intermediate (gray). If you beloved this post and you would like to receive a lot more data relating to manufacturer of sialic acid powder as Raw Material for Supplements kindly visit our web site. B and C, superposition of the 1H,13C HSQC reference spectra of Neu5Ac (blue) and 2,7-anhydro-Neu5Ac (orange) and 1H,13C HSQC reaction mixture at 30 min (where the XY peak is observed to peak, gray).