4-O-demethylbarbatic acid, 4-O-Demethylbarbatinsäure
TLC, spot tests
class: β-Orcinol Depsides
Rf values in standard eluents systems: A: 39 · B: 60 · B': 54 ·
C: 36
Visibility: in natural light: —
· in UV-C (254nm): +
Visibility after H2SO4 spraying and 10 min in 110°C charring:
in natural light: pale yellow, grey halo
in UV-A (ca.360nm): purple, pale yellow halo
Spot tests: K red · C — · P — · FeCl3 blue-violet