eBay

I don't recognize many of these fields. I can only suggest that you use the field names in the original File Exchange manual https://pics.ebay.com/aw/pics/pdf/us/file_exchange/File_Exchange_Advanced_Instructions.pdf with the exception of Brand and MP...

The column headings for Brand and MPN should be C:Brand and C:MPN Is this what you have?

Dunno but when I use X-EBAY-API-DETAIL-LEVEL I always set it to 0 (zero).

Is this any use? Works fine.https://developer.ebay.com/api-docs/buy/browse/resources/search_by_image/methods/searchByImage

Does searching for serine -serene help?