4H-1-Benzopyran-4-one, 3-[[4-O-acetyl-2,3-bis-O-[(2E)-3-[4-(acetyloxy)phenyl]-1-oxo-2-propenyl]-6-deoxy-a-L-mannopyranosyl]oxy]-5,7-bis(acetyloxy)-2-[4-(acetyloxy)phenyl]- AIDS-189947 AIDS189947