1 2H4 (1s)-1-(3,4-dihydroxybenzyl)-1,2,3,4-tetrahydroisoquinoline-6,7-diol 1.000 2 F0C 1-[(4-methoxyphenyl)methyl]-3,4,5,6,7,8-hexahydroisoquinoline 0.739 3 XO3 5-[(2r,4s)-2-(phenylmethyl)piperidin-4-yl]-1,2-oxazol-3-one 0.739 4 REN (S)-reticuline 0.731