An algorithm to input and store wider classes of chemical reactions for mining chemical graphs

SMILES coding is a popular and state of the art representation for input of the chemical reactions in computer. On the other hand, Bond Electron (BE) matrix proposed by Ugi and his co-workers is the state of the art method to represent a chemical compound in computer. However both the SMILES coding and BE matrix representation are for organic compounds. This paper extends SMILES coding to Extended SMILES (ESMILES) coding and BE matrix representation to Extended BE (EBE) matrix representation to include both organic and inorganic compounds. Additionally the ESMILES coding and corresponding EBE matrix representation presented in this paper include anions and cations, co-ordinate compounds and addition compounds in the chemical reactions. Finally, an algorithm to convert chemical reactions in ESMILES notation to EBE matrix representation is presented.