Name		CAS NO.
Ledipasvir intermediate 1499193-67-7		1499193-67-7
(6S)-6-[5-(7-Bromo-9,9-difluoro-9H-fluoren-2-yl)-1H-imidazol-2-yl]-5-azaspiro[2.4]heptane-5-carboxyl		1256388-49-4
Ledipasvir intermediate		1256393-27-7
Ledipasvir intermediate		1256388-50-7
Ledipasvir intermediate		1256387-87-7
1-(7-Bromo-9,9-difluoro-9H-fluoren-2-yl)-2-chloroethanone		1378387-81-5
(S)-2-((methoxycarbonyl)amino)-3-methylbutanoic acid		74761-42-5
Ledipasvir intermediate		1441670-89-8
Ledipasvir intermediate		1256387-74-2
291775-59-2; (1R,3S,4S)-2-(tert-butoxycarbonyl)-2-azabicyclo[2.2.1]heptane-3-carboxylic acid		291775-59-2
Ledipasvir intermediate; (S)-5-(tert-butoxycarbonyl)-5-azaspiro[2.4]heptane-6-carboxylic acid;		1129634-44-1