has role has role is conjugate base of chlorophyll(1-) chlorophyll a cofactor chlorophyll a(1-) chlorophyll a VSRAJQZEEBBURZ-ONWAGYJKSA-M -1 CCC1=C(C)C2=Cc3c(C=C)c(C)c4C=C5[C@@H](C)[C@H](CCC(=O)OC\C=C(/C)CCC[C@H](C)CCC[C@H](C)CCCC(C)C)C6=[N+]5[Mg--]5(n34)n3c(=CC1=[N+]25)c(C)c1C(=O)[C-](C(=O)OC)C6=c31 chebi_ontology InChI=1S/C55H72N4O5.Mg/c1-13-39-35(8)42-28-44-37(10)41(24-25-48(60)64-27-26-34(7)23-17-22-33(6)21-16-20-32(5)19-15-18-31(3)4)52(58-44)50-51(55(62)63-12)54(61)49-38(11)45(59-53(49)50)30-47-40(14-2)36(9)43(57-47)29-46(39)56-42;/h13,26,28-33,37,41H,1,14-25,27H2,2-12H3,(H-,56,57,58,59,61);/q-2;+2/p-1/b34-26+;/t32-,33-,37+,41+;/m1./s1 A cyclic tetrapyrrole anion arising from deprotonation at the 21-position of chlorophyll a. 891.52804 C55H71MgN4O5 892.48100 CHEBI:58416