preferred_name: 5,12,22-TRIHYDROXY-6,6'-DIMETHOXY-7,21-DIMETHYL-30-METHYL-2',3',4',9'-TETRAHYDROSPIRO(17,19,28-TRIOXA-24-THIA-13,30-DIAZAHEPTACYCLO(12.9.6.13,11.02,13.04,9.015,23.016,20)TRIACONTA-4(9),5,7,15,20,22-HEXAENE-26,1'-.BETA.CARBOLIN)-27-ONE, (1R,2R,3R,11S,12S,26R)-