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US 5,210,237 AGranted
Vitamin D.sub.3 analogues
AssigneeDaikin Industries, Ltd.
InventorsYoshiro Kobayashi, Katsuhiko Iseki, Tadabumi Nagai, Yoko Tanaka, Nobuo Ikekawa
Life of this patent
Estimating the term…
Abstract
Vitamin D.sub.3 analogues of the formula: ##STR1## wherein R.sup.1 is hydrogen atom and R.sup.2 is hydroxy, or R.sup.1 is hydroxy and R.sup.2 is hydrogen atom, X is hydrogen atom, hydroxy or a hydroxy protected by a hydroxy-protecting group, and R.sup.3 is hydrogen atom or a hydroxy-protecting group, which have vitamin D.sub.3 -like activities such as activity of controlling calcium metabolism and tumor cell differentiation-inducing activity.
Claims9
A vitamin D.sub.3 analogue of the formula [I]:
- ##STR7## wherein R.sup.1 is hydrogen atom and R.sup.2 is hydroxy, or R.sup.1 is hydroxy and R.sup.2 is hydrogen atom, X is hydrogen atom, hydroxy or a hydroxy protected by a hydroxy-protecting group, and R.sup.3 is hydrogen atom or a hydroxy-protecting group.
Dependencies are inferred from the claim text.