C34H62O11 = 646.496.
Convallarin, C34H62O11, is a glucoside found in Convallaria majalis, and may be obtained from the alcoholic extract of the residue from which the convallamarin has been removed with water. The alcoholic solution is treated with lead acetate, the filtrate freed from lead by hydrogen sulphide, and crystallised by concentration. It occurs in the form of rectangular prisms, or as a crystalline powder, and has an acrid taste. An aqueous solution froths like soap and water when shaken. By long boiling with diluted acids it is split up into sugar and convallaretin, which separates in crystalline form, and is soluble in ether.
Slightly soluble in water, freely soluble in alcohol; insoluble in ether.
Action and Uses.—Convallarin causes gastric pain, nausea, and diarrhoea; it is very little used.
Dose.—1 to 3 decigrams (2 to 5 grains).