An antiarrhythmic agent of the formula
or a pharmaceutically acceptable salt thereof; wherein
R1 is H, C1-C4 alkyl or Ci-C4 alkoxy; X is O,
or a direct link; and
R2 and R3, which are the same or different, are each C1-C4 alkyl, with the proviso that when X is
and R3 are the same.
式中的抗心律失常剂
或其药学上可接受的盐;其中
R1 是 H、C1-C4 烷基或 Ci-C4 烷氧基; X 是 O
或直接连接;以及
R2和R3(相同或不同)各自为C1-C4烷基,但当X是
和 R3 相同时。
US4891372A
申请人:——
公开号:US4891372A
公开(公告)日:1990-01-02
Antiarrhythmic agents, compositions and method of use thereas
申请人:Pfizer Inc.
公开号:US04891372A1
公开(公告)日:1990-01-02
An antiarrhythmic agent of the formula ##STR1## or a pharmaceutically acceptable salt thereof; wherein R.sup.1 is H, C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy; X is O, ##STR2## or a direct link; and R.sup.2 and R.sup.3, which are the same or different, are each C.sub.1 -C.sub.4 alkyl, with the proviso that when X is ##STR3## R.sup.2 and R.sup.3 are the same.