Wei J.-C. & Bi W.-F.
(1999):
Chemical revision of Hypogymnia hengduanensis,
Bryologist,
101(4) [1998]: 556-557
A new lichen species with isidia Hypogymnia hengduanensis, containing barbatic acid and atranorin, was described by Wei in 1984. This chemical revision, using the combined methods of microcrystal test (MCT), thin-layer chromatography (TLC), and high-performance liquid chromatography (HPLC) shows that diffractaic acid is the major compound in addition to barbatic acid and atranorin in H. hengduanensis.
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