Fig. 1From: Low dose triterpene-quinone fraction from Ardisia crispa root precludes chemical-induced mouse skin tumor promotionChemical structure of (a) α-amyrin (left) and β-amyrin (right) exist as isomeric mixture; (b) 2-methoxy-6-undecyl-1,4-benzoquinone (quinone), in TQFBack to article page