narceine

/nahr-see-een, -in/US // ˈnɑr siˌin, -ɪn //UK // (ˈnɑːsiːn) //

麻醉剂,麻醉品,麻醉药,麻醉师

Definitions

n.名词 noun

1
Pharmacology.
- : a narcotic alkaloid, C23H27NO8, occurring in opium and acting as a mild relaxant on smooth muscle.

Papaverine, laudanosine, narcotine, and narceine are four other alkaloids found in opium.
The precipitates produced in solutions of narceine and codeine are crystalline and very characteristic.
Ammonia dissolves only traces of morphine; but narceine and codeine readily.
Narceine forms good crystals, the form being that of long, four-sided rhombic prisms or fine bushy united needles.
Crude narceine may be purified by means of the sodium salt; the latter is dissolved in alcohol and precipitated with ether.