Propose an efficient synthesis for the following transformation: The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. AH2O,H2SO4,HgSO4BtBuOKCHBr,ROOR D E F HCCNa Br2,hv HBr G H 1 H2,Pd 1) O3 1) R2BH 2) H2O 2) H2O2,H2O