Two New Marine Ceramides

Two new ceramides, named spongiamine A and spongiamine B were isolated from the sponge Spongia sp. collected from Weizhou Island in Guangxi Province, China. Their chemical structures were determined as N-(2'-hydroxy-n-tetracosanoyl)-1,3,4-trihydroxy-n-pentadeca-sphingosine and N-(2'-hydroxy-n-tetracosanyl)-n-eicosasphinga-4(E)-ene by IR,1D NMR,2D NMR and EI-MS,MSn spectroscopic methods.