A new dibenzocyclooctadiene lactone lignan, 10-demethoxystegane (1), togeth
er with the known compounds steganone (2) and prestegane B (3), have been i
solated from the organic extract of Steganotaenia araliaeca (Apiaceae). Ste
ganone (2) showed antiproliferative activity against an ovarian cancer cell
line (OVCAR-3).