Back to Phytochemical, antioxidant, in silico, and in vitro anti-breast cancer effects of Erigeron sumatrensis from Gayo Highlands (Indonesia) against MCF-7 cells Phytochemical, antioxidant, in silico, and in vitro anti-breast cancer effects of Erigeron sumatrensis from Gayo Highlands (Indonesia) against MCF-7 cells