Scheme 1From: Activity guided isolation and modification of juglone from Juglans regia as potent cytotoxic agent against lung cancer cell linesReagents and conditions: (a) Propargyl bromide, NaH, acetonitrile, rt, 3 h (b) N3R, CuSO4.5H2O, sodium ascorbate, t-butanol:H2O (1:1), rt, 30 minBack to article page