BITRIX trade offers, find a parent?

Question

1C-Bitrix

Good day. Interested in this question. There are 218 products on the site, each of them contains trade offers (roughly speaking, trade offers are product modifications).
It looks like this.
Commodity (TABLE)
-- Offers
---- Round
---- Square
----- and so on.
Trade offer ID comes to cart processing. I need to get my parent product. (TABLE)

Answer 1

Might be useful to someone

$mxResult = \CCatalogSku::GetProductInfo($id);
  if (is_array($mxResult)){
    echo 'ID товара = '.$mxResult['ID'];
  }else{
    ShowError('Это не торговое предложение');
  }