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E.KleibeukerJ

BFCM35

Flavour:Original

The SAR studies has highlighted the important structural requirements for both melanogenesis and tyrosinase inhibition (Figure 9(a)): (i) direct connection of π-planar structure to thiourea ( 24a – 24b ), (ii) hydrophobic substituent at the para- or meta-position of the phenyl ring was accepted ( 24c – 24d ), substituent at the ortho-position was not tolerated ( 24e ), suggested that C2-substituted phenyl may hinder the complex formation of thiourea with copper ions at the active site of tyrosinase