Phenylethyl Resorcinol which is also called 4-(alpha-Methylbenzyl) resorcinol is equivalent to SymWhite 377. Due to its outstanding skin whitening and spot-removing capabilities, Phenylethyl Resorcinol is widely used in whitening, freckle removing and anti-aging cosmetic formulas. It effectively inhibits melanin synthesis by acting on multiple targets in the melanin synthesis pathway, thus achieving a brightening effect.