Tyrosine is a non-important phenylalanine-derived amino acid. Tyrosine’s structure is built a para-hydroxylated phenyl ring linked to a pentanoic acid team, which can be a five member carbon chain using a carboxyl (C(=O)OH) team about the terminal carbon. This pentanoic acid chain is substituted at R2 using an amino group https://revivalschem.com/product/buy-blue-bliss-aka-borax-molly-pellets-5-mapb-2-fma-5-meo-mipt-blue-bliss-online/