Actinopolymorphol A (1), B (2), and C (3) from ERα/β heterodimerizing fraction of A. rutilus crude extract: (A) structures of 1, 2, and 3; (B) COSY and HMBC correlations observed for 1, 2, and 3; and (C) the sattabacin, sattazolin and kurasoin classes of natural products bearing molecular scaffolds similar to 1 or 2.6–10