Other - Analogues: Do these fall under the DEA's "structurally similiar" definition

[nonames]

According to the DEA's vague definition. Are any of these chemicals structurally similar to any Schedule I or II chemicals

α-PPP: Alpha-pyrrolidinopropiophenone
Possibly structurally related to: Methcathinone
(According to Wikipedia)

2-Benzylpiperidine
Possibly structurally related to: Methylphenidate & Amphetamine

Phenpromethamine
I don't think this one has a schedule I or II analogue

Sibutramine
Is a schedule IV substance, but with that aside if it wasn't scheduled, would it be an amphetamine analogue or an analogue of another schedule I or II substance

(Please note I'm asking if these chemicals are structurally similar to any schedule I or II chemicals, for this reason I did not put it in the Law Section)