Pethidine intermediate A is a four-phenylpiperidine derivative that is a precursor to the opioid analgesic drug pethidine (meperidine).

It is not known to have any analgesic activity in its own right, however other derivatives of pethidine with a 4-cyano group in place of the carboxylate ethyl ester have been found to be active,[2] so pethidine intermediate A might also show opioid effects.

It is scheduled by UN Single Convention on Narcotic Drugs.

It is a Schedule II Narcotic controlled substance in the United States and has an ACSCN of 9232.

The 2014 annual manufacturing quota was 6 grammes (as an end product, presumably for research use).