InChI=1S/C27H29NO4S/c1-18(28-14-2-3-15-28)17-31-23-11-6-19(7-12-23)26-27(20-4-8-21(29)9-5-20)33-25-16-22(30)10-13-24(25)32-26/h4-13,16,18,26-27,29-30H,2-3,14-15,17H2,1H3/t18-,26-,27+/m0/s1