I have a wooden table, at least 10 years old. It has yellow stains on it, presumably from a curry.
I don't know what kind of powder/curry caused the stain. The stains are difficult to remove -- no luck with a soapy cloth.
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Some years ago, I stained some clothing with curry and nothing would remove the stain. Then, it accidentally got left on the washing line for 2 or 3 sunny days in a row - and the stain magically disappeared.
My assumption was that UV light is capable of chemically altering the organic compounds a lot quicker than the equivalent man-made dyes. It might be worth a try to leave the table somewhere where sunlight can get to the stain and see if that does the trick. Remember that ordinary glass blocks UV, so if it's possible to move it outside on a sunny day, that's the test.