The welwitindolinones are a unique class of natural products isolated from the blue-green algae with cancer fighting properties. Journal of the American Chemical Society2014136(42), 14710-14713 Below is one portionof the synthetic transformation. Provide the mechanism of actionfor both products. Justify the formation of intermediatesformed during thecourse of the mechanismandprovide alterative reagents to accomplish the same transformationconcerning the nucleophilic intermediate thatclosesthe ring (6 points)