Sintesis Ester Risinoleat, Oleat, Dekanoat, dan Palmitat dengan Kurkumin serta Uji Toksisitas terhadap Daphnia magna dan Uji Antimikroba = Synthesis of Ricinoleic, Oleic, Decanoate, and Palmitate Esters with Curcumin and Their Toxicity Tests against Daphnia magna and Antimicrobial Tests