Abstract: Methods are known for producing an anti-resonant hollow-core fiber which has a hollow core extending along a fiber longitudinal axis and an inner jacket region that surrounds the hollow core, said jacket region comprising multiple anti-resonant elements. The known methods have the steps of: providing a cladding tube that has a cladding tube inner bore and a cladding tube longitudinal axis along which a cladding tube wall extends that is delimited by an interior and an exterior; providing a number of tubular anti-resonant element preforms; arranging the anti-resonant element preforms at target positions of the interior of the cladding tube wall, thereby forming a primary preform which has a hollow core region and an inner jacket region; further processing the primary preform in order to form a secondary preform, including an elongation process; and drawing the secondary preform in order to form the hollow-core fiber.

Abstract: The present invention relates to novel retinoid antagonists of the formula I wherein the dotted bond can be either hydrogenated or form a double bond; and, when the dotted bond forms a double bond, R1 is lower alkyl and R2 is hydrogen; and, when the dotted bond is hydrogenated, R1 and R2 taken together are methylene to form a cis-substituted cyclopropyl ring; R3 is hydroxy or lower alkoxy; R4 is alkyl or alkoxy; and R5 and R6 are, independently, a C4-12 alkyl or a 5-12 cycloalkyl substituent containing from 1-3 rings which are either unsubstituted or substituted with from 1-3 lower alkyl groups, with the carbon atom of R5 and R6 being linked to the remainder of the molecule to form a quaternary carbon atom pharmaceutically acceptable salts of carbocylic acids of the formula I; as well as method for the treatment of osteoporosis and preneoplastic and neoplastic diseases, and a method for reducing or abolishing adverse events in subjects receiving retinoid agonist treatment by administering a

Abstract: Novel nonatetraenoic acid derivatives which selectively bind to retinoic acid X-receptors (RXR) and which have anti-acne acitvity and which potentiate the activity of retinoids having RAR.alpha. activity are disclosed.

Abstract: Compounds of formula (I) wherein R.sup.1 -R.sup.7, R.sup.10, X and the dotted bond have the meaning given in the specification, bind selectively to retinoid RXR receptors and are useful as antiproliferative agents for dermatological and oncological indications.

Abstract: A compound of the formula ##STR1## its pharmaceutically acceptable salts, and its pharmaceutically acceptable hydrolyzable esters for reducing sebum secretion and combatting acne as well as oral and topical compositions for use thereof.

Abstract: The compounds 9-phenyl-3,7-dimethyl-2,4,6,8 nonatetraenoic acids wherein the phenyl group is substituted with an alkyl, aminoalkyl, hydroxyalkyl, alkoxy, hydroxyalkylamino, and a hydroxy alkoxy group, and derivatives thereof which are used as disease modifying anti-rheumatic agents and as immunosuppressants.

Abstract: The compounds 9-phenyl-3,7-dimethyl-2,4,6,8 nonatetraenoic acids wherein the phenyl group is substituted with an alkyl, aminoalkyl, hydroxyalkyl, alkoxy, hydroxyalkylamino, and a hydroxy alkoxy group, and derivatives thereof which are used as disease modifying anti-rheumatic agents and as immunosuppressants.

Abstract: The compounds 9-phenyl-3,7-dimethyl-2,4,6,8 nonatetraenoic acids wherein the phenyl group is substituted with an alkyl, aminoalkyl, hydroxyalkyl, alkoxy, hydroxyalkylamino, and a hydroxy alkoxy group, and derivatives thereof which are used as disease modifying anti-rheumatic agents and as immunosuppressants.

Abstract: The compounds 9-phenyl-3,7-dimethyl-2,4,6,8-nonatetraenoic acids wherein the phenyl group is substituted with an alkyl, aminoalkyl, hydroxyalkyl, alkoxy, hydroxyalkylamino, and a hydroxy alkoxy group, and derivatives thereof which are used as disease modifying anti-rheumatic agents and as immunosuppressants.

Abstract: The compounds 9-phenyl-3,7-dimethyl-2,4,6,8 nonatetraenoic acids wherein the phenyl group is substituted with an alkyl, aminoalkyl, hydroxyalkyl, alkoxy, hydroxyalkylamino, and a hydroxy alkoxy group, and derivatives thereof which are used as disease modifying anti-rheumatic agents and as immunosuppressants.

Abstract: A chemical synthesis of an SRS-A active compound from the reaction product of 1-halo-2-octyne and the ether of 2-penten-4-yn-1-ol including intermediates in the synthesis, some of which being antagonists of SRS-A useful for treating allergic reactions.

Abstract: A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.

Abstract: 9-Furyl substituted retinoic acid derivatives which are useful as antitumor agents and in the treatment of acne as well as a method for their manufacture are disclosed.

Abstract: A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.

Abstract: A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.

Abstract: A total synthesis of canthaxanthin or dinor-canthaxanthin, known food coloring agents, from pentols.

Abstract: A multi-step, stereospecific total synthesis of steroids utilizing intermediates having a cyanoalkyl A-ring precursor is disclosed. The initial starting materials for this process are the relatively inexpensive and commercially available reagents .gamma.-butyrolactone and sodium cyanide. The process is suitable for the preparation of racemic or optically active, medicinally valuable steroids, particularly 19-norsteroids. It is a feature of this process that conditions employed during the multiple step synthesis are selected so as to retain the normally labile nitrile group even during hydrogenation and hydrolysis steps. In this manner, it is possible to employ the nitrile group as an A-ring precursor without resorting to protective groups as was heretofore found necessary in previous steroid total synthesis processes.

Abstract: A total synthesis of canthaxanthin, a known food coloring agent from alpha or retro ionone.

Abstract: Phosphonium salts of 5-(2,6,6-trimethyl-3-oxocyclohexen-1-yl)-3-methyl-substituted-2-penten-4-y n or 2,4-pentadiene which are intermediates for canthaxanthin.

Abstract: A total synthesis of canthaxanthin, a known food coloring agent from alpha or retro ionone.