Abstract: The present specification provides novel antimicrobial analogs of spectinomycin and intermediates and processes for their preparation. Particularly described are novel 3'-diazo-secospectinomycin derivatives useful in the preparation of a variety of 3'-substituted spectinomycin analogs.

Abstract: New antibacterial compounds, DC--45--A.sub.1 and DC--45--A.sub.2 are produced by fermentation of a microorganism belonging to the genus Streptomyces. The antibiotics are accumulated in the culture liquor and are isolated therefrom. These compounds are also prepared by acid hydrolysis of known compounds, DC--45--A or DC--45--B.sub.2. DC--45--A.sub.2 is also prepared by acid hydrolysis of DC--45--A.sub.1.

Abstract: Novel mono-, di- and triacylated derivatives of scirpentriol are provided for use as antitumor agents. Also provided are methods for the production of such derivatives.

Abstract: The present specification provides novel analogs of khellin. These analogs are all useful as antiatherosclerotic agents. Particularly, the present specification provides 4-methoxy, 9-methoxy, or 4,9-dimethoxy-6,7-dihydro-7,7-disubstituted-5H-furo[3,2-g][1]benzopyran-5- ones.

Abstract: Novel 3-hydroxyiminoscirpen-4.beta., 15-diol esters and derivatives thereof are provided for use as antitumor agents. Also provided are processes for producing the above compounds and methods for using them to inhibit malignant tumors in mammals.

Abstract: Chroman-4-ones are prepared by reacting an o-hydroxyarylcarbonyl compound with a carbonyl compound in the presence of an amine.

Abstract: Novel mono-, di- and triacylated derivatives of scirpentriol are provided for use as antitumor agents. Also provided are methods for the production of such derivatives.

Abstract: Chemical compounds having a substituted oxepane ring and methods of preparing such compounds are described. The compounds are active as utero-evacuant agents.

Abstract: Compounds of the formula ##STR1## wherein R.sub.1 is hydrogen; trifluoromethyl; alkyl of 1 to 11 carbon atoms; cycloalkyl of 3 to 7 carbon atoms; hydroxyl; alkoxy of 1 to 6 carbon atoms; mercapto; (alkyl of 1 to 6 carbon atoms)-mercapto; phenyl-(alkyl of 1 to 3 carbon atoms); phenyl; or mono-, di- or tri-substituted phenyl, where the substituents, which may be identical to or different from each other, are each halogen, alkyl of 1 to 4 carbon atoms, (alkyl of 1 to 6 carbon atoms)-sulfinyl, hydroxyl, alkoxy of 1 to 6 carbon atoms, mercapto or (alkyl of 1 to 6 carbon atoms)-mercapto;R.sub.2 is hydrogen, alkyl of 1 to 6 carbon atoms, cycloalkyl of 3 to 6 carbon atoms or phenyl-(alkyl of 1 to 3 carbon atoms); andR.sub.3 is alkyl of 1 to 6 carbon atoms; optically active antipodes thereof; and non-toxic, pharmaceutically acceptable acid addition salts of said compounds or of said optically active antiposed. The compounds are useful as cardiotonics and antithrombotics.

Abstract: A novel series of 3,8-dihydroxy-scirpen-4.beta.,15-diol esters is provided for use as antitumor agents. The compounds are also useful as intermediates in the preparation of other trichothecene antitumor agents.

Abstract: A synthesis of periplanone-B, a female sex pheromone of the American cockroach, P. americana, is described. Novel compounds which are useful as intermediates in the synthesis of periplanone-B are described including the precursor alcohol, periplanol-B.

Abstract: Novel mono-, di- and triacylated derivatives of scirpentriol are provided for use as antitumor agents. Also provided are methods for the production of such derivatives.