The new secondary metabolite from Polygonatum odoratum Cyclic Dipeptides from the Root of Psammos ilene tunicoides Non-terpenoid Constituents from the Seeds of Euphorbia lathyris Three Cyclic Dipeptides from the Root of Psammosilene tunicoides Studies on chemical constituents of Dioscorea opposita Chemical constituents of Gekko swinhonis Study on chemical constituents from leaves of Tripterygium wilfordii Cyclic dipeptides from Portulaca oleracea