Figure 1
Ribbon motif of [13]-macrodilactones. (a) Structure and number of [13]-macrodilactones using compound I as an illustration. (b) Schematic of the ring showing the three planar units: two esters (brown) and alkene (blue). Key atoms at the termini of the planar units are marked with asterisks. (c) Molecular structure of I from X-ray data. |