Question: In what decades was the synthetic stimulant of which Alpha-Pyrrolidinopentiothiophenone is an analogue where the phenyl ring has been replaced by thiophene developed?
Sentence (from "Alpha-Pyrrolidinopentiothiophenone"): α-Pyrrolidinopentiothiophenone (also known as α-PVT) is a synthetic stimulant of the cathinone class that has been sold online as a designer drug.
Relevant evidence: No