How pencillin G is synthesised?

Question

Pencillin G comes under antibiotics.

Answer 1

It is made by attaching an ethoxyphenyl moiety onto the betalactam molecule.
http://www.elmhurst.edu/~chm/vchembook/652penicillin.html

Answer 2

Beta-lactam antibiotics, which are named for the beta-lactam ring in their chemical structure,1 include the penicillins, cephalosporins and related compounds. These agents are active against many gram-positive, gram-negative and anaerobic organisms. The beta-lactam antibiotics exert their effect by interfering with the structural crosslinking of peptidoglycans in bacterial cell walls. Because many of these drugs are well absorbed after oral administration, they are clinically useful in the outpatient setting.