Tyrosine is a non-essential phenylalanine-derived amino acid. Tyrosine’s construction is produced a para-hydroxylated phenyl ring linked to a pentanoic acid group, which is a 5 member carbon chain by using a carboxyl (C(=O)OH) team over the terminal carbon. This pentanoic acid chain is substituted at R2 with the amino team https://revivalschem.com/product/buy-1p-lsd-150-mcg-pellets/