Nicotabin A Structure Elucidation
Feng et al investigated the chemical constituents of N. tabacum leaves by a dereplication procedure, which resulted in the isolation of a novel compound, nicotabin A, molecular formula C21H28O7.
Cascarinoid A Structure Elucidation
Gao et al isolated, amongst others, Cascarinoid A, the first example of a crotofolane diterpenoid alkaloid, molecular formula C28H31NO5.
Dimericbiscognienyne A Structure Elucidation
Zhao and coworkers had been studying the secondary metabolites of Biscogniauxia sp. They isolated a diisoprenyl-cyclohexane-type meroterpenoid dimer with a new skeleton, Dimericbiscognienyne A (molecular formula C32H40O6).
Ent-Kaurane-Type Diterpenoid Structure Elucidation
Yaouba et al reported the isolation and phytochemical investigation of the constituents of Aspilia pluriseta Schweinf and Aspilia mossambicensis. They isolated, identified and comprehensively investigated compound 1, molecular formula C21H30O3.
Neosetophomone A Structure Elucidation
El-Elimat et al reported five new and one known meroterpenoids, including the discovery of a novel ioxa[4.3.3]propellane metabolite neosetophomone A that incorporates a 3-methyl-2,3-dihydrofuran bridge into a 5,6 tricyclic 2-hydroxycyclopent-2-en-1-one/tetrahydropyran ring system, molecular formula C24H32O5.
Rhodomollacetal A
Zhou et al isolated three novel diterpenoids with an unprecedented 2,3:5,6-di-seco-grayanane carbon skeleton. Rhodomollacetal A was obtained as colorless prisms, molecular formula C21H32O7.
Lancolide E Structure Elucidation
As a part of an ongoing research for SNTs from Schisandra micrantha, a minor SNT featuring a complex tetracyclo[5.4.0.02,4.03,7]undecane-bridged system, termed lancolide E, was isolated by Shi et al, molecular formula C29H32O10.
Actinobenzoquinoline Structure Elucidation
The spectroscopic data presented for the structure elucidation of Actinobenzoquinoline (molecular formula C19H18N2O4) were used to challenge ACD/Structure Elucidator.
SMASH 2018 in Pictures
Last week I attended the annual small molecule NMR conference, SMASH, in Philadelphia, PA. It’s been an exciting year attending NMR meetings as an exhibitor with ACD/Labs and SMASH is my final stop for 2018. From opening with workshops and user meetings to its final symposium, SMASH was a huge success. Let’s take a look back at the most memorable events from last week in pictures.
5α-Cyprinol Structure Elucidation
5α-cyprinol sulfate was isolated from a methanolic extract of fish bile (Cyprinus carpio) after separation by preparative LC. The molecular mass and the presence of a sulfate group were revealed by ESI–MS/MS in the negative mode, and the molecular formula of the compound was determined as C27H48O8S.