Some really interesting isoquinolines have been found in pterocereus gaumeri such as the glucotetrahydroisoquinoline 'pterocereine'. Other alkaloids reported in this species are:
6,7-dimethoxy-5-hydroxy-1-hydroxymethyl-2-methyl-THIQ
6,7-dimethoxy-5-hydroxy-1-hydroxymethyl-2-methyl-THIQ-N-oxide
6,7-dimethoxy-5-glucocyloxy-1-hydroxymethyl-2-methyl-THIQ
3,4-dimethoxy-PEA
3,5-dimethoxy-4-hydroxy-PEA
3,4,5-trimethoxy-PEA (mescaline)

Ohhh tasty.