(-)-corey lactone benzoate (-)-huperzine a (3 5-difluorophenyl)methanol (5-chloropyridin-3-yl)methanol (r)-(-)-n-boc-3-pyrrolidinol (r)-1 2-butanediol (r)-1-boc-3-hydroxypyrrolidine (r)-3-methylmorpholine (s)-1 2-butanediol