27267-71-6
甲基 (2S)-4,9,10'-三羟基-7-甲氧基-5,8,9'-三羰基-4',5,8,9'-四氢-3H,3'H-螺[萘并[2,3-b]呋喃-2,2'-吡喃并[4,3-g]色烯]-7'-羧酸酯