(+)-Usnic acid (9bR)-2,6-diacetyl-7,9-dihydroxy-8,9b-dimethyl-(2H,9bH)-dibenzofuran-1,3-dione 1,3(2H,9bH)-dibenzofurandione, 2,6-diacetyl-7,9-dihydroxy-8,9b-dimethyl-, (9bR)- 3(9bH)-DIBENZOFURANONE, 2,6-DIACETYL-1,7,9-TRIHYDROXY-8,9b-DIMETHYL-, D- 3(9bH)-dibenzofuranone, 2,6-diacetyl-8,9b-dimethyl-1,7,9-trihydroxy-, D- 7562-61-0 EINECS 231-456-0 NSC 5890 Usnic acid, (R)- (8CI) Usnic acid, D- d-Usnic acid d-Usninic acid