You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule calcium;2-[1-carboxybutyl-[2-[[(E)-hept-3-enoyl]amino]ethyl]-(2-hydroxyethyl)azaniumyl]pentanoate into molecular formula.
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C42H76CaN4O12+2
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