HPLC analysis (detection at 520 ± 20 nm) of fresh leaf extracts of
H. colorata and H. colorata ‘Exotica’ showed two anthocyanins, 1
and 2. The quantitative amounts of 1 and 2 in H. colorata ‘Exotica’
leaves were found to be 2.17 and 0.64 mg/g fr. wt., respectively.
When the acidified methanolic extract of H. colorata ‘Exotica’ was
stored for 16 days at room temperature, a third anthocyanin (3)
(20.1%) was observed, while the amount of 1 was reduced
accordingly.