Hermitamides A and B are lipopeptides that were isolated from
Lyngbya majuscula cyanobacteria.1 Lyngbic acid was also isolated
from the marine cyanophyte Lyngbya majuscule (Fig. 1).2 They act
as sodium channel blockers3 and also exhibit important biological
activities such as immunosuppressive activity (ED50 6 lg/mL on
culture cells with concanavaline K and LPS). Hermitamides A (1)
and B (2) also display IC50 values of 2.2 lM and 5.5 lM against
Neuro-2a neuroblastoma cells in tissue culture