Hello I have ecommerce website with hundreds of products. Client has changed the website url structure and parmalinks of whole website. So, if I open old indexed pages from google it shows 404 error. I want to remove all those pages. I know there are tool in webmaster but I want to do it all in once by removing multiple websites from google. ie. http://www.example.com/wholesale/ in this there are hundreds of sub-products in this wholesale category and same with rings and other pages. http://www.example.com/rings/ So, can any one please help me guide how to remove multiple products from google.