Identify the structure of the alkaloid having the following characteristics;

(A). It is a coca alkaloid having molecular formula C8H15NO

(B). As the free base, it rapidly racemizes

(C). Its reactions show the presence of a keto group and a tertiary nitrogen atom

(D) Synthesized by condensing γ-methylaminobutyraldehyde with ethylacetoacetate in buffered solution at pH7

Choose the correct answer from the options given below: