229614-55-5 3-(1'-acetylamino-2'-ethyl)butyl-4-((aminoimino)methyl)amino-2-hydroxycyclopentane-1-carboxylic acid 330600-85-6 BCX 1812 BCX1812 Cyclopentanecarboxylic acid, 3-((1S)-1-(acetylamino)-2-ethylbutyl)-4-((aminoiminomethyl)amino)-2-hydroxy-, (1S,2S,3R,4R)- Peramivir RWJ 270201 RWJ-270201 RWJ270201