Patent ID: 8372972

Claim:
A process for isolating methyl (S)-{8-fluoro-2-[4-(3-methoxyphenyl)piperazin-1-yl]-3-[2-methoxy-5-(trifluoromethyl)phenyl]-3,4-dihydroquinazolin-4-yl}acetate (2S,3S)-2,3-bis[(4-methylbenzoyl)-oxy]succinic acid salt, comprising crystallizing racemic methyl -{8-fluoro -2-[4-(3-methoxyphenyl)piperazin-1-yl]-3-[2-methoxy-5-(trifluoromethyl)phenyl]-3,4-dihydroquinazolin-4-yl}acetate with (2S,3S)-2,3-bis[(4-methylbenzoyl)oxy]succinic acid.