Tyrosine is a non-important phenylalanine-derived amino acid. Tyrosine’s construction is produced a para-hydroxylated phenyl ring linked to a pentanoic acid group, which is a five member carbon chain by using a carboxyl (C(=O)OH) group over the terminal carbon. This pentanoic acid chain is substituted at R2 with the amino team https://revivalschem.com/product/buy-purple-mandala-mix/