Table 1. Results from Stage 4 Validation Trials for the Synthesis of cGMP MDMA·HCl.

trial	yield (%)	purity (% peak area by HPLC)	assay (% w/w by HPLC)
1	85.5	99.95	99.64
2	85.9	99.96	99.40
3	86.2	99.99	99.77
4	86.1	99.95	99.76