Two new diterpenoids, named isodoternifolins A(1) and B(2), together with seven known compounds were isolated from the ethanol extract of dried stems and leaves of Isodon ternifolius (D. Don) Kudo. The structures of 1...Two new diterpenoids, named isodoternifolins A(1) and B(2), together with seven known compounds were isolated from the ethanol extract of dried stems and leaves of Isodon ternifolius (D. Don) Kudo. The structures of 1 and 2 were determined as 7 beta-hydroxy-6 beta,11 alpha,15 beta-triacetoxy-7 alpha, 20-epoxy-entkaur-16-ene and 6 beta,7 beta,15 beta-trihydroxy-11 alpha-acetoxy-7 alpha,20-epoxy-entkaur-16-ene by chemical and spectral evidence respectively.展开更多
In this paper we investigate the existence, uniqueness and regularity of the solution of semilinear parabolic equations with coefficients that are discontinuous across the interface, some prior estimates are obtained....In this paper we investigate the existence, uniqueness and regularity of the solution of semilinear parabolic equations with coefficients that are discontinuous across the interface, some prior estimates are obtained. A net shape of the finite elements around the singular points was designed in [7] to solve the linear elliptic problems, by means of that net, we prove that the approximate solution has the same convergence rate as that without singularity.展开更多
文摘Two new diterpenoids, named isodoternifolins A(1) and B(2), together with seven known compounds were isolated from the ethanol extract of dried stems and leaves of Isodon ternifolius (D. Don) Kudo. The structures of 1 and 2 were determined as 7 beta-hydroxy-6 beta,11 alpha,15 beta-triacetoxy-7 alpha, 20-epoxy-entkaur-16-ene and 6 beta,7 beta,15 beta-trihydroxy-11 alpha-acetoxy-7 alpha,20-epoxy-entkaur-16-ene by chemical and spectral evidence respectively.
文摘In this paper we investigate the existence, uniqueness and regularity of the solution of semilinear parabolic equations with coefficients that are discontinuous across the interface, some prior estimates are obtained. A net shape of the finite elements around the singular points was designed in [7] to solve the linear elliptic problems, by means of that net, we prove that the approximate solution has the same convergence rate as that without singularity.
