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 lithium;dichloromethane;ethyl 2-(7-hydroxypyrazolo[3,4-b]pyridin-7-ium-1-yl)acetate;ethyl 2-pyrazolo[3,4-b]pyridin-1-ylacetate;2-(7-hydroxypyrazolo[3,4-b]pyridin-7-ium-1-yl)acetic acid;hydroxide .
user
C29H34Cl2LiN9O9+2
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