(±)-SLV 319 is the mixture of the CB1 receptor antagonist SLV 319 and its distomer, SLV 319 (+)-enantiomer. SLV 319 is a potent and selective CB1 receptor antagonist (Ki = 7.8 nM) over CB2 (Ki = 7,943 nM). SLV 319 is more water soluble than other known CB1 receptor ligands due to its decreased lipophilicity.