Infobox references. Tryptophan (abbreviated as Trp or W; encoded by the codon UGG) is an Î±-amino acid that is used in the biosynthesis of proteins. It contains an Î±-amino group, an Î±-carboxylic acid group, and a side chain indole, classifying it as a non-polar, aromatic amino acid.
toluene is a common name-The IUPAC name for toluene is methylbenzene.he use of this trivial form (acetate for ethanoic acid in general) is so common that this is called a retained IUPAC name.
The IUPAC name of PbCl4 is lead tetrachloride, an inorganic  compound. The acronym IUPAC stands for the International Union of  Pure and Applied Chemistry, which is a federa â¦ tion of chemists that  create the chemical names of different substances.