Toll definition, a payment or fee exacted by the state, the local authorities, etc., for some right or privilege, as for passage along a road or over a bridge. See more. Dictionary.com
The International Union of Pure and Applied Chemistry (IUPAC, /ËaÉªjuËpÃ¦k/ or /ËjuËpÃ¦k/) is an international federation of National Adhering Organizations that represents chemists in individual countries. It is a member of the International Council for Science (ICSU).
IUPAC â Nomenclature and Terminology (including IUPAC color books) MarvinSketch â Structure to IUPAC Name. MarvinSketch is a chemical editor for drawing chemical structures, queries and reactions. Although it is the default structure editor for Reaxys, it can be downloaded for personal use.