SEARCH Articles Figures Tables 1,3-Oxazines, tetrahydro derivatives 1.2.3.4- Tetrahydro-(3-carboline derivatives 1.2.3.4- Tetrahydro-d-carboline, synthesis of substituted derivatives 1.3- Oxazines tetrahydro-, imino derivatives 1.3- Oxazines tetrahydro-, thiono derivatives Oxo and Thiono Derivatives of Tetrahydro-1,3-oxazine Pyridine derivatives, 1,2,3,6-tetrahydro