used in 吩咐[fen1 fu5]; used in transliteration of chemical compounds

porphin C20H14N4 (loanword)

phenazine (loanword)

thiophene (chemistry) (loanword)

fentanyl (loanword) (Tw)

(pharm.) cefalotin (aka cephalothin)

benzothiophene C8H9, a heterocyclic compound (with one benzene ring and one cyclopentene ring)