Vr. Rao et al., SYNTHESIS AND ANTICOAGULANT ACTIVITY OF SOME NEW PHENOXAZINES FROM LAWSONE, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 32(8), 1993, pp. 903-904
Lawsone (2-Hydroxy-1,4-naphthoquinone), a naturally occurring naphthaq
uinone, has been subjected to condensation with o-aminohydroxycoumarin
s to give substituted phenoxazines (I and II). The products obtained h
ave been screened for their anticoagulant activity.