And {HEAD ~ estrone} is one of important female hormones and is {TAIL ~ a useful substance} as an intermediate to medicines for the therapy of prostatic hypertrophy and other steroid type medicines 
is
And { HEAD ~ estrone } is one of important female hormones and is { TAIL ~ a useful substance } as an intermediate to medicines for the therapy of prostatic hypertrophy and other steroid type medicines
OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH