try the following keywords in http://www.sindice.com/ or sig.ma
1) http://chem2bio2rdf.org/uniprot/resource/gene/NR1I2
2) chem2bio2rdf PXR
3) chem2bio2rdf Paclitaxel
4) CC1=C2C(C(=O)C3(C(CC4C(C3C(C(C2(C)C)(CC1OC(=O)C(C(C5=CC=CC=C5)NC(=O)C6=CC=CC=C6)O)O)OC(=O)C7=CC=CC=C7)(CO4)OC(=O)C)O)C)OC(=O)C

in total, sig.ma indexed above 6 millions of triples in chem2bio2rdf.