Abstract: Diphosphonates or their salts between acids and linear, branch substituted and non-substituted, cyclic, heterocyclic and aromatic amino alcohols are used to treat osteoporosis. Pharmaceutical compositions and therapeutic methods of treating osteoporosis are described.

Abstract: Compounds of formula (I), wherein X and Y are independently carbon or nitrogen but not both simultaneously carbon, R1 is a group (II) and R2 is a group (III), R5 being a carbonate, carbamate or phosphate residue, are useful as anti-gestative, immuno-suppressant and anti-tumor agents

Abstract: Derivatives of general chemical formula L(I) and (IV) are used in the topical treatment of diseases of the epithelial tissues, like psoriasis (epidermis) and ulcerative colitis L(lower intestine). These compounds display a high efficacy when administered for example by epicuaneous route in the case of dermatological illnesses like psoriasis, atopic dermatitis and other similar affections, or when administered by oral or rectal route in the case of diseases of the epithelia of the lower intestine like the ulcerative colitis and Crohn's disease.

Abstract: Compounds of formula (I), wherein X and Y are independently carbon or nitrogen but not both simultaneously carbon, R1 is a group (II) and R2 is a group (III), R5 being a carbonate, carbamate or phosphate residue, are useful as anti-gestative, immuno-suppressant and anti-tumor agents