Some of the amino alcohols of types I HP and I1 derived from 1, 2, 3, 4- tetrahydrophenanthrene2 have been found to possess relatively favorable pharmacological properties. a The 1, 2, 3, 4-tetrahydroisoquino1ino derivative of type I, for example, approaches co- OR' OR ' OR deine and pseudocodeine in analgesic action. The corresponding derivative of type I1 is weaker in analgesic effect, but does not exhibit any ...