if the reaction vessel were exposed to methanol during the course of the reflux, would a diels- alder reaction also take place with the transesterified dienophile from question 1? why or why not? draw the structure of the product(s) formed if the transesterified 5-ethylfuran-2(5h)-one were to undergo a successful diels-alder reaction with 2-ethylcyclohexadiene: