Polymorphic Form finasteride is prepared by first forming a substantially insoluble complex of finasteride and {HEAD ~ a Group or Group metal salt}, such as {TAIL ~ lithium bromide}, and then dissociating the complex by dissolving away the salt component with water, so as to obtain substantially pure Form polymorphic crystalline finasteride 
such as
Polymorphic Form finasteride is prepared by first forming a substantially insoluble complex of finasteride and { HEAD ~ a Group or Group metal salt } , such as { TAIL ~ lithium bromide } , and then dissociating the complex by dissolving away the salt component with water , so as to obtain substantially pure Form polymorphic crystalline finasteride
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH