New Indole Derivatives from Martensia denticulata Seaweed

Abstract

Three new indole derivatives having anti-photo-oxidative activity were isolated from the seaweed, Martensia denticulata. The gross structures of these new compounds were identified as [4-[[N[2-(trim-ethylammonio)-3-phenylpropionyl]tryptophyl]oxymethyl]phenyl]sulfate, [4-[[N-[2-(methylammonio)-4-methylhexanoyl]tryptophyl]oxymethyl]phenyl]sulfate, and [4-[[N[2-(dimethylammonio)-4-methylhex-anoyl]tryptophyl]oxymethyl]phenyl]sulfate, which are named Denticin A, B, and C, respectively.