| Dec 3 2013 7:34PM |
Normal |
Acknowledged |
Hello,
For colbalamin (B12) the mon-isotopic mass given in Chemspider does not seem to correspond to the calculated mon-isotopic mass using C, H, N, O, P, and Co values from Chemspider. This does not seem to be a simple rounding error. ChemCalc.org agrees with the calculated, but not the Chemspider, value. This seems true for other molecules, too. (verapamil, ritonavir).
Are there assumptions that I am missing?
Sincerely,
Robert
Thank you for your feedback - we are investigating this and will let you know when we know more. |