. . "In referring to reactants and reagents, it is intended that the reactant, for the most part, becomes incorporated into the product, e.g. an amino acid, nucleotide, nucleophile, electrophile, diene, alkylating or acylating agent, diamine, or any other synthon, etc. while a reagent may or may not become incorporated into the product, e.g. base, acid, heat, oxidizing or reducing agent, while both wil" . . .