The InChIKey currently consists of three parts separated by hyphens, of 14, 10 and one character(s), respectively, like codice_39. The first 14 characters result from a SHA-256 hash of the connectivity information (the main layer and codice_3 sublayer of the charge layer) of the InChI. The second part consists of 8 characters resulting from a hash of the remaining layers of the InChI, a single character indicating the kind of InChIKey (codice_20 for standard and codice_42 for nonstandard), and a character indicating the version of InChI used (currently codice_43 for version 1.)