5-methylamino-2-[[(2S,3R,5R,6S,8R,9R)-3,5,9-trimethyl-2-[(2S)-1-oxo-1-(1H-pyrrol-2-yl)propan-2-yl]-1,7-dioxaspiro[5.5]undecan-8-yl]methyl]-1,3-benzoxazole-4-carboxylic acid 5-methylamino-2-[[(2S,3R,5R,6S,8R,9R)-3,5,9-trimethyl-2-[(1S)-1-methyl-2-oxo-2-(1H-pyrrol-2-yl)ethyl]-1,7-dioxaspiro[5.5]undecan-8-yl]methyl]-1,3-benzoxazole-4-carboxylic acid 2-[[(2S,3R,5R,6S,8R,9R)-2-[(1S)-2-keto-1-methyl-2-(1H-pyrrol-2-yl)ethyl]-3,5,9-trimethyl-1,7-dioxaspiro[5.5]undecan-8-yl]methyl]-5-methylamino-1,3-benzoxazole-4-carboxylic acid 21186_FLUKA Calcium ionophore III Calcimycin A23187 MLS001056783 SMR000326983 EU-0100317 Calcium ionophore A23187 Lopac0_000317 Calimycin Antibiotic A 23187 C7522_SIGMA