Dihydropyridine derivs. of formula (I) are new. R1 = CH3, C2H5, 2-(methoxy or ethoxy) ethyl or (CH2CH2O)2CH3. R2 = C2H5, isopropyl, tert. butyl, 2-methylpropyl, 2-isopropoxyethyl, CH(CH3)CH2. OCH3, C(CH3)2CH2OCH3, propargyl or 2-methylallyl. R1 and R2 may not be the same. R3 = Cl or CH3O; and R4 = Cl, CH3 or CH3O. (I) are antihypertensives. At low doses they selectively dilate peripheral rather than cardiac vessels and can be given orally or parenterally, e.g. at 0.1-1g/day orally.
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机译：二氢吡啶衍生物。式（I）的化学式是新的。 R1 ＝ CH3，C2H5、2-（甲氧基或乙氧基）乙基或（CH2CH2O）2CH3。 R 2 ＝ C 2 H 5，异丙基，叔。丁基，2-甲基丙基，2-异丙氧基乙基，CH（CH3）CH2。 OCH3，C（CH3）2CH2OCH3，炔丙基或2-甲基烯丙基。 R1和R2可能不相同。 R3 = Cl或CH3O; R4 ＝ Cl，CH3或CH3O。 （一）是降压药。在低剂量时，它们选择性地扩张外周血管而不是扩张血管，并且可以口服或肠胃外给药，例如口服。每天口服0.1-1g。
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