To continue the natural identified chemical after that,we have found that 4-(4-hydroxyphenyl)-2-butanol(Rhododendrol:RD)inhibited the melanin synthesis more than Arbutin did.

我在探索天然化合物的过程中,发现4-(4-羟苯基)-2-丁(:以下简称RD)抑制黑色素合成的作用比熊果苷更强。

Betulin and betulinic acid, the triterpenes of the lupane family, are considered to be potential agents against tumoral cancer and HIV .

木、木酸是有羽扇烷结构的三萜化合物，目前的研究发现，有较高的抗肿瘤、抗HIV病毒活性，的衍生物也有较高的生物活性。

Approximately 30 compounds have been identified in the aroma of green tea, the major ones being benzyl alcohol, phenylethyl alcohol, a hexenol, linalool, geraniol and methyl salicylate.

约有30种化合物已从绿茶的香气中鉴别出来，其中主要的有苯甲、苯乙、已烯、沉香、香茅和甲基水杨酸酯。