RESIDUE 18Y 87 CONECT C3 4 C2 C4 H3A H3B CONECT C5 3 C6 C23 H5 CONECT O1 1 C1 CONECT C7' 3 O7' C8' C4' CONECT O7' 1 C7' CONECT C8' 4 C7' H81' H82' H83' CONECT C1 3 O1 C2 C20 CONECT C2 4 C3 C1 H2B H2A CONECT C4 4 C3 C21 H4A H4B CONECT C6 3 C5 C7 C18 CONECT C7 3 C6 C8 C11 CONECT O8 2 C8 C13 CONECT C8 3 C7 O8 C22 CONECT O9 2 C9 H9 CONECT C9 3 O9 C20 C22 CONECT O10 2 C19 C24 CONECT C19 3 O10 C21 C23 CONECT O11 2 C11 C15 CONECT C11 4 C7 O11 C12 H11 CONECT O12 2 C12 C15 CONECT C12 4 C11 O12 C13 H12 CONECT O13 2 C13 C1' CONECT C13 4 O8 C12 O13 C14 CONECT O14 2 C14 H1 CONECT C14 4 C13 O14 C15 C17 CONECT C15 4 O11 O12 C14 C25 CONECT C25 4 C15 O26 O16 H16 CONECT O1' 2 C1' C5' CONECT C1' 4 O13 O1' C2' H1' CONECT C2' 4 C1' C3' H2' H2 CONECT O3' 2 C3' HO3 CONECT C3' 4 C2' O3' C4' H3' CONECT O4' 2 C4' H4' CONECT C4' 4 C7' C3' O4' C5' CONECT C5' 4 O1' C4' C6' H5' CONECT C6' 4 C5' H61' H62' H63' CONECT C20 3 C1 C9 C21 CONECT C21 3 C4 C19 C20 CONECT C18 4 C6 H61A H63A H62A CONECT C22 3 C8 C9 C23 CONECT C23 3 C5 C19 C22 CONECT C24 4 O10 H111 H112 H113 CONECT O26 2 C25 C27 CONECT C27 4 O26 H62B H63B H61B CONECT C28 4 O16 H63C H61C H62C CONECT C17 4 C14 H171 H172 H3 CONECT O16 2 C25 C28 CONECT H3A 1 C3 CONECT H3B 1 C3 CONECT H5 1 C5 CONECT H81' 1 C8' CONECT H82' 1 C8' CONECT H83' 1 C8' CONECT H2B 1 C2 CONECT H2A 1 C2 CONECT H4A 1 C4 CONECT H4B 1 C4 CONECT H9 1 O9 CONECT H11 1 C11 CONECT H12 1 C12 CONECT H1 1 O14 CONECT H16 1 C25 CONECT H1' 1 C1' CONECT H2' 1 C2' CONECT H2 1 C2' CONECT HO3 1 O3' CONECT H3' 1 C3' CONECT H4' 1 O4' CONECT H5' 1 C5' CONECT H61' 1 C6' CONECT H62' 1 C6' CONECT H63' 1 C6' CONECT H61A 1 C18 CONECT H63A 1 C18 CONECT H62A 1 C18 CONECT H111 1 C24 CONECT H112 1 C24 CONECT H113 1 C24 CONECT H62B 1 C27 CONECT H63B 1 C27 CONECT H61B 1 C27 CONECT H63C 1 C28 CONECT H61C 1 C28 CONECT H62C 1 C28 CONECT H171 1 C17 CONECT H172 1 C17 CONECT H3 1 C17 END HET 18Y 87 HETSYN 18Y (1S,2R,3aS,4S,13aS)-2-(dimethoxymethyl)-1,12-dihydroxy- HETSYN 2 18Y 7-methoxy-1,5-dimethyl-11-oxo-1,2,3a,4,8,9,10,11-octahy HETSYN 3 18Y dro-13aH-2,4-epoxyfuro[3,2-b]naphtho[2,3-h]chromen-13a- HETSYN 4 18Y yl 4-C-acetyl-2,6-dideoxy-alpha-L-xylo-hexopyranoside HETNAM 18Y Trioxacarcin A analogue, bound form FORMUL 18Y C33 H40 O14