All
 D03 Heterocyclic Compounds D006571 +
 D03.438 Heterocyclic Compounds, 2-Ring D006574 +
 D03.438.531 Isoquinolines D007546 +
 D03.438.531.205 Debrisoquin D003647 
 D03.438.531.321 Emetine D004640 
 D03.438.531.535 Nomifensine D009627 
 D03.438.531.567 Noscapine D009665 
 D03.438.531.690 Praziquantel D011223 
 D03.438.531.750 Salsoline Alkaloids D012490 
 D03.438.531.770 Saquinavir D019258 
 D03.438.531.400 1-(5-Isoquinolinesulfonyl)-2-methylpiperazine D019307 
 D03.438.531.520 Nelfinavir D019888 
 D03.438.531.820 Tetrahydroisoquinolines D044005 
 D03.438.531.085 Benzylisoquinolines D044182 +