Product Hierarchy extraction from ECC

Hi all,

I got an issue of extracting the product hierarchy data from the ECC, actually they are not using the standard hierarchy for this. Because they want the hierarchy at product group level, so in ECC in T Code MC85 they are configuring the product hierarchy. That data i need to extract into the BI system.

When i checked the technical details it was showing that in the backend through programm that transaction is getting executed and storing the hierarchy structure. so can any body suggest me the approach, how i can generate the extractor to get this data to BI.

This is very important and mostly required by the client.

Thanks

Prabhakar