[1]Ornstein;Arnold;Augenstein;Paschal[JournalofOrganicChemistry,1991,vol.56,#14,p.4388-4392]
Title: 6-Hydroxy-1,2,3,4-tetrahydro-isoquinoline-3-carboxylic acid mimics active conformation of tyrosine in opioid peptides.
Journal: Bioorganic & medicinal chemistry letters 20050516