Methylamine derivatives of the formula: ##STR1## and pharmaceutically acceptable acid addition salts thereof, wherein R.sub.1 and R.sub.3 each represent a hydrogen atom or a straight- or branched-chain alkyl, alkenyl or alkynyl radical containing from 1 to 6 carbon atoms, R.sub.2 represents a straight- or branched-chain alkyl, alkenyl or alkynyl radical containing from 2 to 7 carbon atoms with the proviso that when R.sub.2 represents an alkenyl radical of the formula CH.tbd.CH--R.sub.4 or an alkynyl radical of the formula C=C--R.sub.4, in which R.sub.4 represents a hydrogen atom or a straight- or branched-chain alkyl radical of 1 to 5 carbon atoms, R.sub.1 and R.sub.3 each represent an atom of hydrogen or an alkyl radical, R.sub.1, R.sub.2 and R.sub.3 being such that no compound of formula I possesses more than 13 carbon atoms. They are useful for treating Parkinson's disease and for correcting extra-pyramidal disturbances provoked by neuroleptics.
化学式为##STR1##的甲基胺衍
生物及其药学上可接受的酸盐,其中R.sub.1和R.sub.3分别表示氢原子或含有1至6个碳原子的直链或支链烷基、烯基或炔基基团,R.sub.2表示含有2至7个碳原子的直链或支链烷基、烯基或炔基基团,但当R.sub.2表示公式CH.tbd.CH--R.sub.4的烯基基团或公式C=C--R.sub.4的炔基基团,其中R.sub.4表示氢原子或含有1至5个碳原子的直链或支链烷基基团时,R.sub.1和R.sub.3分别表示氢原子或烷基基团,R.sub.1、R.sub.2和R.sub.3的选择使得公式I的化合物中不含有超过13个碳原子。它们可用于治疗帕
金森病并纠正由神经类药物引起的额外锥体外运动障碍。