Codeia
CODEINA, or CODEINE (C18H21NO3 Or C17H18 (CH3 NO3, methyl morphine), an alkaloid obtained by digesting opium with warm water, precipitating the meconic acid with calcium chloride, and concentrating the filtrate; the hydrochlorates of morphine an codeine crystallize out first, and may be separated by treating their aqueous solution with ammonia, which precipitates the morphine; the liquid is then evaporated, and the codeine is precipitated by caustic potash and recrystallized from ether.