Hi i just wanted to make sure about this question. I am being asked to find the functional group of Vinblastine. Would the functional groups be ester, amine, ether, and a carboxylic acid?

Here is the best I could do. I don't think it's a matter if what functional group but how many functional groups. I see amines, alcohols. etc.

https://pubchem.ncbi.nlm.nih.gov/compound/Vinblastine#section=2D-Structure