
{"publication_number": "US-2007225359-A1", "abstract": "the invention relates to compounds of general formula ; in which r is an amino or guanidino group ; r 2 is acetyl or trifluoroacetyl ; and n is an integer from 10 to 18 or a pharmaceutically acceptable derivative thereof , methods for their preparation , pharmaceutical formulations containing them or their use in the prevention or treatment of a viral infection .", "application_number": "US-75126907-A", "description": "the invention will now be described in detail by way of reference only to the following non - limiting examples . micromass platform ii mass spectrometer operating in positive ion electrospray mode , mass range 100 - 1000 amu . the prep column used was a supelcosil abzplus ( 10 cm \u00d7 2 . 12 cm ). gradient : 20 - 40 % a / 20 min , 40 % a / 20 min , 40 - 100 % a / 0 . 3 min , 100 % a / 15 min , 100 - 20 % a / 3 min benzhydryl ( 2r , 3r , 4s )- 3 -( acetylamino )- 4 -({( e )-[( tert - butoxycarbonyl ) amino ][( tert - butoxycarbonyl ) imino ] methyl 