There was no indication of compound instability in sample solutions.
Sample extracts were stable on HPTLC plates for at least one day.
Two-dimensional chromatography using the same mobile phase system was used to discover decomposition occurring
during sample application and development. If decomposition
occurs during development, peak(s) of the decomposition product(s)
should be obtained in both the first and second directions
of the run. No decomposition was observed during sample application
and development.