The process according to this invention is useful as a method for producing an estrone acetal as {HEAD ~ an estrone precursor} in {TAIL ~ the industrial scale} 
in
The process according to this invention is useful as a method for producing an estrone acetal as { HEAD ~ an estrone precursor } in { TAIL ~ the industrial scale }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL