The halogenated alkylamine antihistamines all exhibit optical isomerism and brompheniramine products contain racemic brompheniramine maleate whereas dexbrompheniramine ( Drixoral ) is the dextrorotary ( right-handed ) stereoisomer.
12.
The halogenated alkylamine antihistamines all exhibit optic isomerism and brompheniramine products contain racaemic brompheniramine maleate whereas dexbrompheniramine ( Drixoral ) is the dextrorotary ( right-handed ) stereoisomer.
13.
When examined in particular pharmacological assays for psychomotor stimulant-like activity, both the dextrorotary and levorotary enantiomeric forms of methcathinone hydrochloride have been found to be pharmacologically active.
14.
Betaprodine was 550 per cent as strong as morphine SC, and the laevorotary cis isomer was 350 per cent as strong, and the dextrorotary cis isomer was 790 per cent was strong.
15.
As a consequence, circular dichroism is exhibited by most biological molecules, because of the dextrorotary ( e . g . some sugars ) and levorotary ( e . g . some amino acids ) molecules they contain.
16.
In these assays, the l-form of methcathinone is more active than either d-methcathinone or dextroamphetamine ( this is notable as the dextrorotary isomer is the more active isomer of both amphetamine and methamphetamine ).
17.
By salt content, the active ingredients of Adderall are 25 % levoamphetamine salts ( the levorotary or'left-handed'enantiomer ) and 75 % dextroamphetamine salts ( the dextrorotary or'right-handed'enantiomer ).
18.
The rotation of the plane of polarization may be either clockwise, to the right ( dextrorotary d-rotary ), or left ( levorotary l-rotary ) depending on which stereoisomer is present ( or dominant ).
19.
If there is a pair of enantiomers, each with one stereocenter, then one enantiomer is " R " and the other is " S ", and likewise one enantiomer is levorotary and the other is dextrorotary.
20.
It is obtained by hydrolysis of cocaine with acids or alkalis, and crystallizes with one molecule of water, the crystals melting at 198 199 �C . It is levorotary, and on warming with alkalis gives iso-ecgonine, which is dextrorotary.
