RESIDUE 53A 48 CONECT N1 3 N3 C6 C1 CONECT N3 3 N1 N4 HN3 CONECT C4 3 C5 S1 N2 CONECT C5 3 C4 C6 C11 CONECT C6 3 N1 C5 C12 CONECT O2 1 C9 CONECT N4 3 N3 C3 HN4 CONECT O3 1 C10 CONECT C10 3 O3 C13 C7 CONECT C13 4 C10 H13 H13A H13B CONECT C7 4 C10 C9 S1 H7 CONECT C9 3 O2 C7 O5 CONECT O5 2 C9 C15 CONECT C15 4 O5 C19 H15 H15A CONECT C19 4 C15 H19 H19A H19B CONECT S1 2 C4 C7 CONECT N2 2 C4 C1 CONECT C11 3 C5 C16 H11 CONECT C16 3 C11 C17 H16 CONECT C17 3 C16 C12 H17 CONECT C12 3 C6 C17 H12 CONECT C3 3 N4 C1 C8 CONECT C1 3 N1 N2 C3 CONECT C8 3 C3 O1 O4 CONECT O1 1 C8 CONECT O4 2 C8 C14 CONECT C14 4 O4 C18 H14 H14A CONECT C18 4 C14 H18 H18A H18B CONECT HN3 1 N3 CONECT HN4 1 N4 CONECT H13 1 C13 CONECT H13A 1 C13 CONECT H13B 1 C13 CONECT H7 1 C7 CONECT H15 1 C15 CONECT H15A 1 C15 CONECT H19 1 C19 CONECT H19A 1 C19 CONECT H19B 1 C19 CONECT H11 1 C11 CONECT H16 1 C16 CONECT H17 1 C17 CONECT H12 1 C12 CONECT H14 1 C14 CONECT H14A 1 C14 CONECT H18 1 C18 CONECT H18A 1 C18 CONECT H18B 1 C18 END HET 53A 48 HETNAM 53A ethyl 5-{[(1R)-1-(ethoxycarbonyl)-2-oxopropyl]sulfanyl} HETNAM 2 53A -1,2-dihydro[1,2,3]triazolo[1,5-a]quinazoline-3-carboxy HETNAM 3 53A late FORMUL 53A C18 H20 N4 O5 S1