Excluding four H atoms, the molecule of the title compound, C(16)H(14)O, is almost planar, with an r.m.s. deviation of 0.0801 (2) Å. Due to p-π conjugation, the lengths of the two single bonds attached to the O atom are significantly different.

Phosphonated isoxazolinyl nucleosides have been prepared via 1,3-dipolar cycloaddition reaction of nitrile oxides with corresponding vinyl or allyl nucleobases for antiviral studies. The cytotoxicity, the anti-HSV activity and the RT-inhibitory activity of the obtained compounds were evaluated and compared with those of AZT and diethyl{(1'SR,4'RS)-1'-[[(5-methyl-2,4-dioxo-3,4-dihydropyrimidin-1...