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Chemical investigation of the dichloromethane extract of the aerial parts of Plectranthus scutellarioides led to the isolation and characterization of 10 diterpenoids with an abietane skeleton and one cembrane-type diterpenoid. Among them, six have not yet been described in the literature. Their structures were established by 1D and 2D NMR, UV and IR spectroscopy, and HRESIMS. The relative configuration...
Efficient strategies for the solid phase synthesis of constrained macrocyclic peptides are valuable tools for the generation of potentially biologically active compound libraries. In particular, the use of covalent linkers as hydrogen bond surrogates for the initiation and stabilization of α-helical secondary structures, resulting in the formation of a 13-membered macrocycle, is a validated approach...
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