metachromin S
metachromin s
A sesquiterpenoid that is 5-amino-2-hydroxy-3-methyl-1,4-benzoquinone in which one of the hydrogens of the methyl group is replaced by a 2-methyl-4-[(1<i>R</i>,2<i>S</i>)-1,2,3-trimethylcyclohex-3-en-1-yl]but-1-en-1-yl group and one of the hydrogens attached to the nitrogen is replaced by a 3-methylbutyl group. It is isolated from an Okinawan sponge <em>Spongia</em> sp.SS-1037 and exhibits moderate cytotoxicity against L1210 murine leukemia and KB human epidermoid carcinoma cells.