<qa>  What is the name of the drug that is used in chemotherapy?RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining more than one drug may kill more tumor cells. It is not yet known whether carboplatin and paclitaxel combined with gemcitabine is more effective than carboplatin and paclitaxel alone in treating ovarian epithelial or fallopian tube cancer. 