Enantiomeric alcohols 15 (1S,2S,5R) and ent-15 (1R,2R,5S) as well as diastereomeric methyl ethers ent-17 (1R,2R,5S) and ent-22 (1R,2S,5S) display high sigma1 receptor affinity. Cell growth inhibition of the stereoisomeric alcohols and methyl ethers against five human tumor cell lines is investigated. In particular, at a concentration of 20 muM the four methyl ethers stop completely the cell growth of