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CHEMMOLScreenshot 

 

CHEMMOL (V1.0) is a freeware program for the calculation of molecular masses and chemical analyses of compounds. It was written with the organic chemist in mind. Thus, apart form (most) of the elements a number of organic functional groups and some protecting groups were added to the database. Likewise, all naturally occuring amino acids were added to the database.

Screenshot of CHEMMOL