Constituents of the Leaves of Aristolochia kaempferi

Two new phenanthrene derivatives, aristoliukine-A, -B, and a benzenoid, sodium (2R)-(p-hydroxyphenyl)-lactate, together with thirty-three known compounds were isolated from the fresh leaves of Aristolochia kaempferi. Structures were elucidated by spectral analysis. Among the new compounds, sodium (2R)-(p-hydroxyphenyl)lactate was determined to be in the salt form by IR and 1 H-NMR methods.