The lipophilic seed extract of Atalantia ceylanica is characterized by two new oximes, ataloxime A and B, and the known furanocoumarins bergapten, xanthotoxin, heraclenin, oxypeucedanin and imperatorin. The structures of the oximes were elucidated by spectroscopic methods, whereas the furanocoumarins were identified by HPLC-UV and TLC comparisons with authentic samples. The oximes displayed contact toxicity against freshly hatched larvae of the pest insect Spodoptera littoralis but did not show antifungal activities against Cladosporium herbarum.