The structure of a new pentacecilide congener, pentacecilide D, produced by Penicillium cecidicola FKI-3765-1 was elucidated by various NMR experiments. The absolute stereochemistry of pentacecilides ...

Many drugs are derived from natural products. But before natural products can be exploited, chemists must first determine their structure and stereochemistry. This can be a major challenge, ...

In the late 1800s, chemists started to develop ways to depict the spatial arrangements of atoms and groups in molecules possessing one or more stereogenic centres in two dimensions, and sought a means ...