Front Cover. Total 23 eleven‐residue peptaibols, including five reported ones (1–5) in our previous work, were isolated from the fungus Trichoderma longibrachiatum Rifai DMG‐3‐1‐1, which was obtained from the mushroom Clitocybe nebularis. The structures of the 13 new peptaibols (6–10 and 12–19) were determined by their NMR, MALDI‐MS/MS, ECD data and Marfey's analyses. Comparison of the IC50s against the tested cell lines indicated that the 2nd (Gln2/Asn2), 3rd (Ile3/Val3) and 4th (Ile4/Val4) amino acid residues affected their cytotoxicities powerfully. Compounds 2, 5, 9, 11, 21 and 22 also showed moderate antibacterial activities against Staphylococcus aureus MRSA T144. This article analyzed the structure‐activity relationship of eleven‐residue peptaibols comprehensively, and further enriched the family of peptaibol, as reported by Zhang et al. in their research article at 10.1002/cbdv.202200627.

Induced polarization logging is widely used in deep mineral exploration. The data interpretation requires fast and reliable forward and inversion solutions. We have developed an efficient inversion framework in this paper. The forward problem was solved using a finite element approximation with a recycling Krylov subspace algorithm for the multiple linear systems. Considering the model complexity in 3D modeling of logging, mixed meshes were employed to model borehole geometries. The inverse implementation is based on the GaussNewton and Jacobian-free Krylov techniques. We used a coarse mesh for inversion to reduce the ill-posedness. The formulae for Jacobian-vector and Jacobian-transport-vector products were deduced to avoid the storage of derivative matrices. Model updates were calculated efficiently by an inexact preconditioned conjugate gradient algorithm.

Front Cover. Five new peptaibols, longibramides A – E (1–5) with 11 amino acid residues, were isolated from a fungus Trichoderma longibrachiatum Rifai DMG‐3‐1‐1, which was isolated from a mushroom Clitocybe nebularis (Batsch) P. Kumm collected from coniferous forest in the subboreal area of northeast China. The structures of longibramides A – E were determined by their spectroscopic data (NMR and MS‐MS spectra), their absolute configurations were determined by X‐ray diffractions and Marfey's analyses. The X‐ray diffractions of longibramides A, B and the similar CD spectra of A – E showed that they all had α‐helix conformations. Longibramides B and E showed moderate cytotoxicities against BV2 and MCF‐7 cells, and also showed some inhibitory effects against methicillin‐resistant Staphylococcus aureus MRSA T144. This result enriched the family of peptaibol, as reported by Zhang et al. in their full paper at10.1002/cbdv.202100128.

Three rare carbamate‐containing alkaloids, penicimutamides A—C are isolated from a fungal mutant from the diethyl sulfate mutagenesis of marine‐derived Penicillium purpurogenum G59.

No abstract