ent-Kauranoid derivatives from Sideritis moorei

The new natural compounds ent-7α 18-dihydroxykaur-16-en-3-one and ent-18-acetoxy-3β,7α-dihydroxykaur-15-en-17-al, ent-18-acetoxy-3β,7α,17-trihydroxykaur-15-ene, ent-18-acetoxy-3β,7α,17-trihydroxy-15β,16β-epoxykaurane, besides their ent-3β-acetoxy-18-hydroxy derivatives, have been isolated from Sideritis moorei.