A natural like O-glycoconjugate polycyclic compound 4 was synthesized.
Derivative 4 was evaluated by NCI for its in vitro antiproliferative activity.
It caused 50% growth inhibition in the range 0.47–5.43 μM.
Compound 4 treatment induced a prolonged arrest of MDA-MB-231 cells at G2/M phase.
This is due to cyclin B1 and cdc2 down-regulation and p21 expression up-regulation.