RESIDUE 0CM 21 CONECT O12 2 P8 H1 CONECT P8 4 O12 O13 O9 O7 CONECT O13 1 P8 CONECT O9 2 P8 H2 CONECT O7 2 P8 P6 CONECT P6 4 O7 O10 O11 O5 CONECT O10 1 P6 CONECT O11 2 P6 H3 CONECT O5 2 P6 C4 CONECT C4 4 O5 C3 H4 H5 CONECT C3 2 C4 C2 CONECT C2 2 C3 C1 CONECT C1 4 C2 H6 H7 H8 CONECT H1 1 O12 CONECT H2 1 O9 CONECT H3 1 O11 CONECT H4 1 C4 CONECT H5 1 C4 CONECT H6 1 C1 CONECT H7 1 C1 CONECT H8 1 C1 END HET 0CM 21 HETNAM 0CM but-2-yn-1-yl trihydrogen diphosphate FORMUL 0CM C4 H8 O7 P2