Synonyms: MicrocystinLA, 5-L-methionine-; 1,4,7,10,14,17,21-Heptaazacyclopentacosane, cyclic peptidederiv.; Cyclo[2,3-didehydro-N-methylalanyl-D-alanyl-L-leucyl-erythro-3-methyl-D-b-aspartyl-L-methionyl-(2S,3S,4E,6E,8S,9S)-4,5,6,7-tetradehydro-9-methoxy-2,6,8-trimethyl-10-phenyl-3-aminodecanoyl-D-g-glutamyl]