DASYPOGALACTONE, A NEW CHIRALIC C3-SYMMETRIC MACROLACTONE FROM LICHEN USNEA DASYPOGA ROHL - Gani, Ratna Layla; Faculty of Pharmacy, the Pancasila University, Jagakarsa, Jakarta (Faculty of Pharmacy Universitas Gadjah Mada, Yogyakarta, Skip Utara, 55281, Indonesia, 2005)