You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 2-[[(E)-4-[[(2R,3R,11bR)-9,10-dimethoxy-3-(2-methylpropyl)-2,3,4,6,7,11b-hexahydro-1H-benzo[a]quinolizin-2-yl]oxy]-4-oxobut-2-enoyl]amino]-3-phenylpropanoic acid .
user
C32H40N2O7
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