Objective: To study the chemical constituents from the tubers of Bletilla striata. Method: The chemical constituents were isolated and purified by silica

Sephadex LH-20

and preparation of TLC. Their structures were identified by physicochemical properties and spectroscopic methods. Result: Twelve compounds were isolated from the ethyl acetate extracts of B. striata

including physcion(1)

erythroglaucin(2)

8-C-p-hydoxybenzylkaempferol(3)

N-benzoyl-L-phenylalaninyl-N-benzoyl-L-phenylalaninate(4)

pinoresinol(5)

(E)-4''''-hydroxyphenethyl 3-(4'-hydroxyphenyl) acrylate (6)

dihydo-p-methoxy cinnamic acid(7)

p-hydroxybenzaldehyde(8)

p-hydroxybenzoic acid(9)

vanillic acid(10)

dibutyl phthalate(11)

and ethyl palmitate(12). The types of these compounds included anthraquinones(1 and 2)

flavonoid (3)

amino acid derivative (4)

lignan(5)

phenyl propanoids(6 and 7)

other aromatic compounds (8-11) and aliphatic compound(12). Conclusion: Compounds 2

3

4

6

7

11 and 12 were reported from B. striata for the first time.