RegEx或类似 - 抓取匹配值之前的字符串

Here's the deal, I am handling a OCR text document and grabbing UPC information from it with RegEx. That part I've figured out. Then I query a database and if I don't have record of that UPC I need to go back to the text document and get the description of the product.Here's the deal, I am handling a OCR text docum