Study on purification technology of patchouly oil with molecular distillation Morphological Characters and the Composition of Essential Oil from Regeneration Plant of Pogostemon cablin Flavonoids isolated from Pogostemon cablin Self-microemulsifying drug delivery system of patchoulic alcohol to improve oral bioavailability in rats Studics on Chcmical Constltuents of Pogostemon cablin (Blanco)Benth Purification of patchouli alcohol in volatile oil of Pogostemon cablin by molecular distillation