Y. Hitotsuyanagi et al., SYNTHESIS OF 4-OXA-2-AZAPODOPHYLLOTOXIN, A NOVEL ANALOG OF THE ANTITUMOR LIGNAN PODOPHYLLOTOXIN, Tetrahedron letters, 35(50), 1994, pp. 9401-9402
4-Oxa-2-azapodophyllotoxin (5) has been synthesized from sesamol (6).
5 showed significant activity against adriamycin-resistant P-388 leuke
mia cells.