I predict all those pyrrolidine analogues do because of similarity to spermine, spermidine - very pungent cum smelling amines that also have a nitrogen linked to butyl linked to nitrogen. Only in this article it is the very same a single nitrogen. Basically, plain pyrrolidine on its own also smells https://mdphp-freebase-online82581.blazingblog.com/29277134/mdphp-freebase-online-no-further-a-mystery