SEARCH Articles Figures Tables Bonds heteroatom Bonds synthesis C bonds formation synthesis C-heteroatom C-heteroatom bond formation C-ring Formation of C-0 bonds Formation of CS Formation of a,-bonds Formation of bonds Heteroatom Bond Formation Heteroatomic Rings Of pyrrole Of pyrrole formation Pyrrol rings Pyrrole bonding Pyrrole formation Pyrroles formation Pyrroles ring synthesis Pyrroles, pyrrolic rings Pyrroles, synthesis Ring formation Synthesis of Pyrrole Synthesis of pyrroles