EP1969129A1 - METHOD FOR PRODUCING (R) - AND (S)-4-(1-AMMONIUMETHYL)BENZOIC ACID METHYLESTER-SULPHATE FROM RACEMIC 4-(1-AMINOETHYL)BENZOIC ACID METHYLESTER BY LIPASE CATALYSED ENANTOSELECTIVE ACYLATION AND SUBSEQUENT PRECIPITATION WITH SULPHURIC ACID