A Study of ET-743 (Trabectedin) in Patients With Advanced Breast Cancer

580 mcg/m2, 3-hour i.v. infusion, on Days 1, 8, and 15 every 28 days for up to approximately 52 weeks in the absence of disease progression. Dexamethasone, 10 mg i.v, will be administered 30 minutes prior to each trabectedin infusion.

1,300 mcg/m2, 3 hour i.v. infusion once every 21 days for up to approximately 52 weeks in the absence of disease progression. Dexamethasone, 10 mg i.v, will be administered 30 minutes prior to each trabectedin infusion.