Four new materials,such as carbon suspension,sodium sulfonate of polyoxyethylene allyl glycidyl nonyl phenyl ether,vanillyl alcohol,vanillin,etc,in lead-acid storage batteries were reviewed.
Because while synthetic vanillin is the same molecule you'll find in the stuff from vanilla beans, real vanilla has hundreds of other compounds that subtly change the flavor.
So vanillin is a component that's derived from oil that we pump out of the ground. It's the same feedstock that we use to make petrol that we use in our cars.