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