Synonyms: Microcystin LA,3-L-tyrosine-5-L-arginine-;Cyanoginosin LA, 3-L-tyrosine-5-L-arginine-;Cyanoginosin YR;Cyclo[2,3-didehydro-N-methylalanyl-D-alanyl-L-tyrosyl-erythro-3-methyl-D-b-aspartyl-L-arginyl-(2S,3S,4E,6E,8S,9S)-4,5,6,7-tetradehydro-9-methoxy-2,6,8-trimethyl-10-phenyl-3-aminodecanoyl-D-g-glutamyl];