{HEAD ~ This invention} relates to {TAIL ~ the stereospecific process} for the preparation, separation and purification of hexahydrodibenzofurans which are used in the preparation of the 5HT3 compounds 
relates to
{ HEAD ~ This invention } relates to { TAIL ~ the stereospecific process } for the preparation , separation and purification of hexahydrodibenzofurans which are used in the preparation of the 5HT3 compounds
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL 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