(+/-)-1,3(2H,9bH)-Dibenzofurandione, 2,6-diacetyl-7,9-dihydroxy-8,9b-dimethyl- (+/-)-Usnic acid 125-46-2 2,6-Diacetyl-1,2,3,9b-tetrahydro-7,9-dihydroxy-8,9b-dimethyldiben- zofuran-1,3-dione/ Usno 39012-86-7 (SODIUM SALT) AIDS-010703 AIDS010703 NSC8517 Usnein Usniacin Usnic acid