Table 1.

Important natural forms and derivatives of chemopreventive natural compounds in HNSCC

Important natural forms and derivatives
Natural compoundNameSource
Vitamin ARetinyl palmitate, isotretinoin, β-carotene(6–9, 12, 13, 98)
IsothiocyanatePEITC, BITC, sulforaphane(28, 31, 36)
Green teaEC, EGC, ECG, EGCG(2, 38, 40, 49)