HPLC analysis of soluble UV-absorbing compounds in leaves, seeds, and roots of ref4-3 and the wild type. The elution of compounds was monitored by absorbance at 330 nm. Compounds are identified as follows: Co, coniferin; F, flavonoid; K, rha-glc-kaempferol; Q, rha-glc-quercetin; SC, sinapoylcholine; SG, sinapoylglucose; SM, sinapoylmalate; and Sy, syringin.