How to find Whatsapp’s ChatStorage.sqlite in a local iPhone backup on Mac?

I want to export my WhatsApp chats from my iPhone without resorting to a closed-source freeware software. So I made an iPhone backup with iTunes and now I have a backup at ~/Library/Application Support/MobileSync. It seems like the WhatsApp messages are saved in a file called ChatStorage.sqlite. But the file and folder names are all hashes like ac1588e41783a26bd5caba3da324d5f04704a253.

How do I find ChatStorage.sqlite?