This invention relates to compounds of the formula ##STR1## or an optical isomer thereof wherein R.sup.1 and R.sup.2 are the same or different and are an alkyl or alkenyl group of 6 to 24 carbon atoms; R.sup.3, R.sup.4 and R.sup.5 are the same or different and are alkyl of 1 to 8 carbon atoms, aryl, aralkyl of 7 to 11 carbon atoms, or when two or three of R.sup.3, R.sup.4, and R.sup.5 are taken together to form quinuclidino, piperidino, pyrrolidino, or morpholino; n is 1 to 8; and X is a pharmaceutically acceptable anion.
本发明涉及下列式的化合物或其光学异构体:##STR1## 其中R.sup.1和R.sup.2相同或不同,是6至24个碳原子的烷基或烯基基团;R.sup.3,R.sup.4和R.sup.5相同或不同,是1至8个碳原子的烷基,芳基,7至11个碳原子的芳基烷基,或当R.sup.3,R.sup.4和R.sup.5中的两个或三个结合形成喹诺啉,
哌啶,
吡咯烷或吗啉时;n为1至8;X为药学上可接受的阴离子。