FIELD: organic chemistry, medicine.
SUBSTANCE: invention describes compounds of the general formula (I): 
or their salts wherein dotted line means a double bond optionally; L means fragment of group comprising -CH2-CH2-CH2-, -CH2-CH=CH- and CH2-C≡C-; each R2 and R3 means independently alkyl or halogenalkyl; R1 and R4 mean independently hydrogen atom, acyl group or hydroxy-protecting group under condition that at least one radical among R1 and R4 mean acyl group. Also, invention relates to using compounds of the formula (I) or their salts as medicinal agents used in treatment of hyperthyroidism, renal osteodystrophy or osteoporosis.
EFFECT: valuable medicinal properties of compounds.
28 cl, 4 tbl, 13 ex
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