WX [WuXi PharmaTech (Cayman)] SC 13D/A: SCHEDULE 13D/A CUSIP No. Page 2 of 14
[SCHEDULE 13D/A CUSIP No. Page 2 of 14 pages 1 NAME OF REPORTING PERSONS Warburg Pincus Private Equity X, L.P. 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP ¨ (a) (b) ⊠]