1H, 13C, 15N HMBC, and 19F NMR spectroscopic characterisation of seized flephedrone, cut with benzocaine

- Evidence that flephedrone, a cathinone, is being cut to increase street profits.
- The first evidence of cutting flephedrone with the topical anaesthetic benzocaine.
- Benzocaine has recently been reported as a toxic molecule.
- This is an urgent warning about benzocaine that needs to be heeded.
- We correct errors in the analytical data of the literature standard flephedrone.