The authors regret that Figure 1. which shows the structures of prymnesin toxins reads that R3 = α-ᴅ-Galf when it should read β-ᴅ-Galf. As such is may be unclear why the subsequent synthesis focuses on β-ᴅ-Galf. The corrected figure is shown here:
The authors would like to apologise for any inconvenience caused.

