“…33,34 The inhibitory activity of compounds 1-21 on the proliferation of activated HSC-T6 cells was evaluated (see Supporting Information, S36). These compounds consisted of oleanane type (1, 2, 5-12), ursane type (3,4,(13)(14)(15)(16)(17)(18)(19), and lupane type (20,21), according to their aglycone moieties (see Supporting Information, S1). Substitutions such as OH (1-21), carboxyl (5-9, 12-17, and 19), oxo (1, 2, 8, 9, and 17), and glucopyranoside (1, 3, 4, 10, 11, and 18) also divided them into several groups.…”