isoquinoline alkaloid Tuduranine 297.34840 An isoquinoline alkaloid that has formula C18H19NO3. C18H19NO3 CHEBI:80910 COc1cc2CCN[C@@H]3Cc4ccc(O)cc4-c(c1OC)c23 InChI=1S/C18H19NO3/c1-21-15-8-11-5-6-19-14-7-10-3-4-12(20)9-13(10)17(16(11)14)18(15)22-2/h3-4,8-9,14,19-20H,5-7H2,1-2H3/t14-/m1/s1 KEGG:C17077 KUECBJOPWMRHEX-CQSZACIVSA-N chebi_ontology