amongst the compounds which , when injected subcutaneously in substantial amount shortly before the chloral hydrate ( 250 mg./kg . intraperitoneally ) , increased sleeping time significantly were adrenaline , noradrenaline , phenylephrine , methoxamine , 5-hydroxytryptamine ( serotonin ) , histamine , ergotamine , yohimbine , and atropine .
C0014563
adrenaline
C0028351
noradrenaline