text: Yo, check it out, listen up, I got some news to share,
  We found a new triterpenoid, weigelic acid, it's rare (1),
  Along with seven known compounds, they're no joke,
  Ursolic acid, ilekudinol A, corosolic acid, that's the scope (2-4),
  Ilekudinol B, esculentic acid, pomolic acid too (5-7),
  And don't forget asiatic acid, it's part of the crew (8).
  
  We isolated these from Weigela subsessilis, no doubt,
  In the leaf and stem, that's where they sprout,
  The structure of the new one is fly, let me break it down,
  It's 1beta, 2alpha, 3alpha, 23-tetrahydroxyurs-12-en-28-oic acid, solid as the ground.
  
  But hold up, there's more to this scientific tale,
  We checked their anti-complement activity, without fail,
  Against the classical pathway of the complement system,
  And guess what? Some of these compounds, they're no victims.
  
  Compounds 1 and 2, 4 to 8, they got the power,
  To inhibit the hemolytic activity, they devour,
  With IC50 values, they showed their might,
  152, 90, 130, 51, 56, 4, and 163 microM, shining bright.
  
  But yo, compound 3, it's kinda inactive, no action seen,
  But the rest of the crew, they're keeping it clean,
  So remember, the carboxylic group in these triterpenoids,
  Plays a role in stopping hemolysis, they bring joy.
  
  That's the science, the facts, the real deal,
  Weigela subsessilis got compounds with appeal,
  So keep your eyes open, there's more to explore,
  In the world of triterpenoids, we keep seeking more.