1,3(2H,9bH)-Dibenzofurandione, 2,6-diacetyl-7,9-dihydroxy-8,9b-dimethyl- 125-46-2 NSC8517 USNIC ACID, (DL) Usinic acid Usnein Usniacin Usnic acid Usninsaeure Usno WLN: T B656 CV EV HO FU BHT & JB1 DV1 KQ L1 MQ