(2R*,3S*,7R*,9R*)Halichondramine 4H-1-benzopyran-4-one, 5,7-dihydroxy-3-(4-hydroxyphenyl)-6,8-dimethyl- InChI=1/C32H56N2/c1-2-5-10-14-18-23-34-26-29-19-15-11-7-4-6-9-13-17-22-33-24-21-32(31(25-29)28-34)30(27-33)20-16-12-8-3-1/h2,5,9,13,29-32H,1,3-4,6-8,10-12,14-28H2/b5-2-,13-9-/t29-,30+,31+,32+/m1/s rel-(4Z,12R,14R,21Z,29R,30S)-1,16-diazatetracyclo[27.3.1.1~12,16~.0~14,30~]tetratriaconta-4,21-diene (non-preferred name)