Efforts have been imposed to isolate and confirm the
identity of the encountered conversion products.
Therefore, the experimental fungus was cultivated for 96h
in GL containing medium (namely medium I). Two
conversion products, main product I (70 %) and minor
product II (30 %) were isolated. The TLC analysis reveals
that the main product I which has Rf 0.33 is glycyrrhetic
acid (GA) and the other minor product II, whose Rf = 0.68
is 3-oxo-glycyrrhetic acid (3-oxo-GA). This preliminary
identification was based on studying the TLC profile of