Cover Illustration
2021, Vol.5 No.3-4 The cover picture shows that Paeonia is composed of P. suffruticosa Andr, P. labiflora, P. delavayi, P. rockii, etc. Monopenoids have been isolated in the genus, which can be divided into paeoniflorin type paeonisufrrone type, albiflorin type, paeoniflorone type, and paeoniflorgenone type. More details are discussed in the article by Xu et al. on page 210011.