Objective: To study the chemical constituents of twigs of Artocarpus nanchuanensis. Method: The constituents were isolated from 95% ethanol extraction of twigs of A. nanchuanensis by column chromatography over silica gel

Diaion HP20 macroreticular resin

MCI CHP 20P gel

Sephadex LH-20 gel

ODS gel

etc. Their structures were elucidated by analysis of physical chemical properties and spectral data. Result: Ten compounds were isolated and their structures were identified as diosgenin (1)

prosapogenin of dioscin (2)

progenin Ⅱ(3)

diosgenyl-3-O-α-L-rhamnopyranosyl(1→3)-[α-L-rhamnopyranosyl (1→4)]-β-D-glucoside (4)

7-oxositosterol acilglicosilado (5)

ethyl caffeate (6)

dibutylphthalate (7)

pinoresinol (8)

(7S

8S

8'R)-5

5'-dimethoxylariciresinol (9)

palmitic acid (10). Conclusion: Except for compounds 6 and 10

the other compounds are reported from the family Moraceae for the first time. This is the first time that 4 has been reported as naturally occurring compound.