The present invention relates to crystalline R-guanidines of
(2S)-2-Ethoxy-3{4-[2-(10H-phenoxazin-10-yl)ethoxy]phenyl}propanoate, its
preparations and its use as therapeutic agents. More specifically the
present invention relates to crystalline Arginine (2S)-2-Ethoxy-3-{4-[2-(-
10H-phenoxazin-10-yl)ethoxy]phenyl}propanoate, preferably (L)-Arginine
(2S)-2-Ethoxy-3-{4-[2-(10H-phenoxazin-10-yl)ethoxy]phenyl}propanoate, its
preparation and its use as therapeutic agent.