Analisis kuersetin dan kurkuminoid dalam tablet yang mengandung ekstrak daun jambu biji (Psidium guajava Linn) dan rimpang kunyit (Curcuma domestica Val) secara KLTKTĀ-spektrofotodensitometri (Analysis of Quercetin and Curcuminoid in Tablet Containing Exract of Guava Leaves and Turmeric Rhizome by HPTLC-Spectrophotodensitometry)