Text this: Prunellate A: An Unprecedented Lignan Lactone with a 6/7/6/5-Fused Tetracycle Skeleton by C‑2–C-2′ and C‑7–C-8′ Linkage from the Chinese Medicinal Plant Prunella vulgaris Inhibiting the Activation of Hepatic Stellate Cells by Targeting FXR