| Member | Definition | Role |
|---|
| 1,2,3,4-tetrahydro-1-(phenylmethyl)isoquinoline | | (RS)-1-benzyl-1,2,3,4-tetrahydroisoquinoline |
| laudanine | A benzyltetrahydroisoquinoline that is norlaudanosoline carrying four methyl substituents at positions N-1, O-6, O-7 and O-4'. | laudanine; rac-laudanosoline |
| reticulin | | reticuline |
| tetrahydropapaverine | A benzylisoquinoline alkaloid that is norlaudanosoline in which the four phenolic hydrogens have been replaced by methyl groups. | 1-(3,4-dimethoxybenzyl)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline |
| tetrahydropapaveroline | | norlaudanosoline |