Abstract: Disclosed are retiferol derivatives of formula (I): wherein X is >C═CH2 or —CH2—; Y and Z are independently of each other hydrogen, fluorine or hydroxy; A is —O(CH2)3—, —(CH2)2-(1,2-C6H4)—, —CH═CH—(1,2-C6H4)—, —C═C—(1,2C6H4)—, —(CH2)2—CO—, —CH2—O—CO—, —CH2NHCO—, or —CH2NHCOCH2—; R1 is C1-C5-alkyl; R2 and R3 are independently of each other alkyl or perfluoroalkyl; and R4 is hydrogen, hydroxy, C1-C5-alkyl or C1-C5-alkyl or C1-C5-alkoxy; the use of such compounds to treat or present hyperproliferative skin diseases such as psoriasis, basal cell carcinomas, disorders of keratinization and keratosis; neoplastic diseases; disorders of the sebaceous glands such as acne and seborrhoic dermatitis; the use of these compounds in reversing the conditions associated with photodamage, particularly for the oral or topical treatment of the skin damaged through sun exposur

Abstract: Compounds of formula I wherein X is C═CH2 or CH2; Y and Z are independently of each other hydrogen, fluorine or hydroxy; A is —C≡C—, —CH═CH— or —CH2—CH2—, R1 and R2 are independently of each other alkyl or perfluoroalkyl; and R3 is lower alkyl are useful in the treatment or prevention of hyperproliferative skin diseases, particularly psoriasis, basal cell carcinomas, disorders of keratinization and keratosis; or for reversing the conditions associated with photodamage.

Abstract: Compounds of formula (I) ##STR1## as defined by the specification. The compounds are useful in the treatment or prevention of vitamin D dependent disorders, particularly psoriasis, basal cell carcinomas, disorders of keratinization and keratosis, leukemia, osteoporosis, hyperparathyroidism accompanying renal failure, transplant rejection and graft vs. host disease.

Abstract: The present invention relates to vitamin D derivatives of the formula I ##STR1## wherein X is C.dbd.CH.sub.2 or CH.sub.2 ;Y is hydrogen, fluorine or hydroxyZ is hydroxyn is 1 or 2R.sup.1 is lower alkyl,R.sup.2 is a branched alkyl having 3 to 8 carbon atoms which is unsubstituted or substituted with one or more halogen or OH substituents, or is a phenyl group which is unsubstituted or substituted with a branched alkyl having 3 to 8 carbon atoms which is unsubstituted or substituted with one or more halogen or OH substituents;and the dotted carbon-carbon bond in ring D is --C--C-- or --C.dbd.C--; or a pharmaceutically usable salt thereof.

Abstract: This invention relates to novel imidazole derivatives of formula a ##STR1## and pharmaceutically acceptable salts of these compounds, wherein R.sup.1, R.sup.2, R.sup.3, R.sup.5, R.sup.7 and R.sup.8 are as disclosed herein. These compounds are protein kinase inhibitors useful in the treatment of atherosclerosis, psoriasis, alopecia, and tumors.

Abstract: Compounds of formula I: ##STR1## wherein the dotted carbon-carbon bond in the D-ring is C--C or C.dbd.C; C(R,R) is CH.sub.2 or C.dbd.CH.sub.2,R.sup.1 is H, F or OH,R.sup.2 and R.sup.3 are each independently C.sub.1-4 -alkyl or CF.sub.3, or together with the carbon to which they are bound form C.sub.3-6 -cycloalkyl.are useful in the treatment of vitamin D dependent disorders, such as psoriasis, leukemia; acne and seborrhoic dermatitis; osteoporosis hyperparathyroidism accompanying renal failure; and multiple sclerosis.