Susidarti, Ratna Asmah; Department of Chemical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada. Yogyakarta, Indonesia.; Rianti, Andrih; Department of Chemical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada. Yogyakarta, Indonesia.; Martono, Sudibyo; Department of Chemical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada. Yogyakarta, Indonesia.