Two New Compounds from Rhizomes of Musa basjoo

Two new compounds, rel-(3S,4aR,10bR)-3-(4 '-methoxyphenyl)-8-hydroxy-9-methoxy-4a,5,6,10b-tetrahydro-3H-naphtho[2,1-b]pyran (1), 7-hydroxy- 2-phenylnaphthalene-1-carboxylic acid ethyl ester (2), were isolated from the 70% ethanol extract of the rhizomes of Musa basjoo. Their structures were determined on the basis of spectroscopic analysis including 1-dimensional (1D), 2D nuclear magnetic resonance and high-resolution electrospray ionization mass spectroscopy.