Functional groups: cocaine and methamphetamine?

Question by MizButterfly: Functional groups: cocaine and methamphetamine?
What functional groups are common to both do cocaine and methamphetamine molecules? Thanks!
What about the N – nitrogen? or is that not a functional group.
and phenyl ring is the same thing as a benzene ring?

Best answer:

Answer by Chad
Not much beyond a methylamine and a phenyl ring.

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