| 摘要 |
There is provided, a novel pro-drug form of digoxin having the following formula: <IMAGE> wherein R represents a member selected from the group consisting of a hydrogen atom, a residue of any naturally occurring amino acid, and a <IMAGE> group, wherein X and Y, which may be the same or different, each represent a member selected from the group consisting of a methyl group and an ethyl group, or wherein X and Y may form a (CH2)4 or (CH2)5 heterocyclic ring with the N atom to which each of X and Y are attached, and a non-toxic inorganic or organic pharmaceutically acceptable acid addition salt thereof, with the proviso that:
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