• 2022-06-09 问题

    Which of the following has two equatorial alkyl substituents in its most stable conformation? () A: 1,1-dimethylcyclohexane B: cis-1,2-dimethylcyclohexane C: cis-1,3-diethylcyclohexane D: cis-1,4-diethylcyclohexane E: trans-1,3-diethylcyclohexane

    Which of the following has two equatorial alkyl substituents in its most stable conformation? () A: 1,1-dimethylcyclohexane B: cis-1,2-dimethylcyclohexane C: cis-1,3-diethylcyclohexane D: cis-1,4-diethylcyclohexane E: trans-1,3-diethylcyclohexane

  • 2022-07-28 问题

    Which statement is not true about quinidine ____. A: It<br/>is composed of quinolone ring and quinolone base ring. B: The<br/>two rings are connected by hydroxymethyl. C: Contains<br/>two substituents (methoxy and ethylene) D: It<br/>has four chiral carbons. E: The<br/>target is K+ channel blocker.

    Which statement is not true about quinidine ____. A: It<br/>is composed of quinolone ring and quinolone base ring. B: The<br/>two rings are connected by hydroxymethyl. C: Contains<br/>two substituents (methoxy and ethylene) D: It<br/>has four chiral carbons. E: The<br/>target is K+ channel blocker.

  • 2022-07-28 问题

    Which statements are true about quinidine: A: It is composed of quinoline ring and quinoline base ring B: The two rings are connected by hydroxymethyl C: Contains two substituents (methoxy and ethylene). D: It has four chiral carbons(3R,<br/>4S, 8R, 9S ), is the dextroisomer. E: The target is K+<br/>channel blocker.

    Which statements are true about quinidine: A: It is composed of quinoline ring and quinoline base ring B: The two rings are connected by hydroxymethyl C: Contains two substituents (methoxy and ethylene). D: It has four chiral carbons(3R,<br/>4S, 8R, 9S ), is the dextroisomer. E: The target is K+<br/>channel blocker.

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