Question

The number of stereogenic centre(s) present in the given alkaloid is _ _ _. (answer in integer)

Hint:

While counting stereogenic centres, count only stable tetrahedral atoms attached to four different groupsDo not count aromatic carbons, alkene carbons, or rapidly inverting amine nitrogen

Answer 1

Correct Answer: 4

Step 1: What counts as a stereocentre.
A stereocentre is an sp$^3$ carbon bonded to four different groups.

Step 2: Scan the alkaloid.
The aromatic and double bonded carbons are sp$^2$ and do not count, and nitrogen inverts too fast to count.

Step 3: Count the valid carbons.
Four sp$^3$ carbons, the carbinol carbon and three in the bicyclic amine, meet the four different groups rule.

Step 4: Answer.
\[ \boxed{4} \]