7α-hydroxy-4-methyl-15(14->8α)-abeo-16-norestra-1,3,5(10)-trien-17-one

7β-hydroxy-4-methyl-15(14->8α)-abeo-16-norestra-1,3,5(10)-trien-17-one

对甲苯磺酰氯

5-羟甲基糠醛

5-[(formyloxy)methyl]furfural