<prompt> Which anaesthetic belongs to ester groupProcaineBupivacaineLignocaineMepivacaine  <response>: Esters aminoesters:- procaine, chlorprocaine, tetracaine amethocaine, Benzocaine, CocaineAmides aminoamides:- Lignocaine, Mepivacaine, Prilocaine, bupivacaine, Etidocaine, ropivacaine, dibucaineRefer: Morgan and Mikhails Clinical Anaesthesiology, 5th edition, pg no. 268-270 