This reaction follows the mechanism of Pinner reaction, i.e. under an acidic environment, an alcohol esterificates a nitrile with water to form an imino ester. ChemBalancer balanced a large number of incomplete reactions by adding help species to the RHS of reactions. Although these help species were the most frequent species present as the side products of the reactions, by adding these help species as side products, these reactions were only completed in terms of material balance at the two sides of the reactions. However, the reaction mechanisms were not evaluated and, therefore, some help species completed reactions remain false positive. In contrast, the reagents or solvents balanced reactions were rare to be incorrect, since these candidate reagents and solvents are clues to complete the