Need tables related to Supplier Product in Supplier Portal

We are building an automation to reverse sync of the PDH item with supplier .

Plan is to select only those set of items for which there is a mismtach between PDH item and Supplier Portal Item.

PDH table for item is - EGP_SYSTEM_ITEMS_B , EGO_ITEM_EFF_B.

Below is one API to fetch supplier products.

Rest API - https://fa-eqjd-saasfaprod1.fa.ocs.oraclecloud.com/fscmRestApi/resources/11.13.18.05/supplierProducts?q=ProductNumber=100000463

we need tables which are being use by the API