Chart of amphetamine derivatives seeking feedback on accuracy and classification

https://imgur.com/a/wkTDaLc

I created this chart to help visualize the various subgroups of amphetamines and cathinones based on structural modifications (ring substitution, N-substitution, alpha-substitution, etc.).

The goal is to clarify the relationships between different compounds — from common therapeutics like lisdexamfetamine to more obscure research chemicals like 5-IAI or α-PHP.

I'd love feedback from this community on: accuracy of classification, any key compounds I may have missed, etc.

NOT seeking feedback on the organization of the chart.

Thanks in advance!