Function Module needed to identify the real substance

Hi Experts/Gurus,

I am looking for a function module that would provide me with the list of all the real substances when I happen to know the pure susbstances and provide it as an input & the condition to obain the real substance is that all these real substances have the pure susbtance ( given as an input ) assigned to them in the composition tab, for  VAT = SAP_EHS_1012_001 and and are solvent (ESTVP-COMPCAT).

Thanks in advance

Regards