The dried preparation containing I is reconstituted in {HEAD ~ an alcohol solvent}, such as, for example, {TAIL ~ methanol} and treated with an organic acid, such as for example, p toluenesulfonic acid to remove the ethoxyethyl ether group 
such as
The dried preparation containing I is reconstituted in { HEAD ~ an alcohol solvent } , such as , for example , { TAIL ~ methanol } and treated with an organic acid , such as for example , p toluenesulfonic acid to remove the ethoxyethyl ether group
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH 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