The process according to {TAIL ~ this invention} can produce an estrone acetal at a high yield and with {HEAD ~ economical advantages} in the industrial scale and the estrone acetal thus obtained is useful as an estrone precursor which is important as a female hormone 
The process according to { TAIL ~ this invention } can produce an estrone acetal at a high yield and with { HEAD ~ economical advantages } in the industrial scale and the estrone acetal thus obtained is useful as an estrone precursor which is important as a female hormone
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