INHIBITORY POTENTIAL OF SOME SYNTHETIC CINNAMIC ACID DERIVATIVES TOWARDS TYROSINASE ENZYME Daya Hambat Beberapa Turunan Asam Sinamat SintetikTerhadap Enzim Tirosinase - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 2008)