English name: (+) -Usniacin; D-Usnic acid; (+) -Usnein; D-26-Diacetyl-79-dihydroxy-89b-dimethyl-13 (2H, 9bH) -dibenzofurandione

Other names: (+) - usnic acid; usnic acid; lichen acid; D-26- diacetyl -79- dihydroxy -89b- dimethyl -13 (2H, 9bH) - dibenzofuran dione

CAS: 7562-61-0

C18H16O7 = 344.32

Level: BR

Content: ≥98.0% (TLC)

Specific rotation: + 488º (C = 0.7, chloroform)

Traits: yellow rhomboid prism crystals soluble in chloroform, soluble in alcohol and ether, insoluble in water, melting point 204 ℃ toxic, the median lethal dose (mice, intravenous) 25mg / kg...

Use: Biochemical studies of broad-spectrum antibiotics, for most Gram-positive bacteria have a strong inhibitory effect, can also inhibit the growth of Mycobacterium tuberculosis

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