A - Human Necessities – 61 – K
Patent
A - Human Necessities
61
K
A61K 31/415 (2006.01) A61K 31/41 (2006.01) A61K 31/4178 (2006.01) A61K 31/4192 (2006.01) A61K 31/422 (2006.01) A61K 31/4245 (2006.01) A61K 31/433 (2006.01) A61K 31/454 (2006.01) A61K 31/4725 (2006.01) A61K 31/496 (2006.01) A61K 31/506 (2006.01) A61K 31/5355 (2006.01) A61K 31/5377 (2006.01) C07D 491/04 (2006.01) C07D 498/04 (2006.01) C07D 513/04 (2006.01)
Patent
CA 2158931
Disclosed are cardiotonic medicines containing, as the active ingredient, at least one of compounds of formula (I) and their pharmacologically acceptable salts when they form salts. Image (I) wherein X1 and X2 do not exist or represents an oxygen atom; A represents OH or a C1-C4 acyloxy group; B represents a hydrogen atom or may form a chemical bond along with A; X is an oxygen atom, nitrogen, sulfur, etc.; R1 and R2 each represents a hydrogen atom, a C1-C4 alkyl group, etc.; R3 and R4 each represents a hydrogen atom, a C1-C4 alkyl group, etc., or they may together form a 1,4-butylene or 1,5-pentylene group. The compounds have a strong activity of reinforcing the contraction of cardiac muscles and a strong activity of reducing the rate of heart beats. As they are not toxic, they are useful as cardiotonic medicines.
Kamikawaji Yoshimasa
Masuda Yukinori
Matsumoto Hiroo
Ohrai Kazuhiko
Seto Kiyotomo
Gowling Lafleur Henderson Llp
Nissan Chemical Industries Ltd.
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