*** CHEMICAL IDENTIFICATION *** RTECS NUMBER : HP5295050 CHEMICAL NAME : 3(9bH)-dibenzofuranone, 2,6-diacetyl-1,7,9-trihydroxy-8,9b-dimethyl-, D- CAS REGISTRY NUMBER : 7562-61-0 LAST UPDATED : 198910 DATA ITEMS CITED : 2 MOLECULAR FORMULA : C18-H16-O7 MOLECULAR WEIGHT : 344.34 WISWESSER LINE NOTATION : T B656 EV HO BHJ B1 CQ DV1 JV1 KQ L1 MQ COMPOUND DESCRIPTOR : Reproductive Effector SYNONYMS/TRADE NAMES : * 1,3(2H,9bH)-dibenzofurandione, 2,6-diacetyl-7,9-dihydroxy-8,9b-dimethyl-, (9bR)- * 3(9bH)-dibenzofuranone, 2,6-diacetyl-8,9b-dimethyl-1,7,9-trihydroxy-, D- * (+)-Usnic acid * d-Usnic acid * Usnic acid, (R)- * (+)-Usninic acid * d-Usninic acid *** HEALTH HAZARD DATA *** ** ACUTE TOXICITY DATA ** TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - mouse DOSE/DURATION : 838 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : TAKHAA Takeda Kenkyusho Ho. Journal of the Takeda Research Laboratories. (Takeda Yakuhin Kogyo K.K., 2-17-85 Jusohon-machi, Yodogawa-ku, Osaka 532, Japan) V.29- 1970- Volume(issue)/page/year: 31,247,1972 ** REPRODUCTIVE DATA ** TYPE OF TEST : TDLo - Lowest published toxic dose ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - mouse DOSE : 1500 ug/kg SEX/DURATION : female 1 day(s) after conception TOXIC EFFECTS : Reproductive - Fertility - female fertility index (e.g. # females pregnant per # sperm positive females; # females pregnant per # females mated) REFERENCE : NATUAS Nature. (Nature Subscription Dept., POB 1018, Manasguan, NJ 08736) V.1- 1869- Volume(issue)/page/year: 176,249,1955 *** END OF RECORD ***