7-ethylcamptothecin is a pyranoindolizinoquinoline. 7-Ethylcamptothecin has the superior antitumor activity than camptothecin, it has a stronger growth-inhibiting activity against tumor cells and remains in the intestinal tract for a longer time and in higher amounts when administered in vivo. 7-Ethylcamptothecin is a derivative of camptothecin and a key intermediate in the synthesis of 7-ethyl-10-hydroxycamptothecin. 7-Ethylcamptothecin can be used in tumor related research.

N(3)-oxalyl-L-2,3-diaminopropionic acid is an Nbeta-acyl-L-2,3-diaminopropionic acid in which the acyl group is oxalyl. It is functionally related to a propionic acid. It is a conjugate acid of a N(3)-(carboxylatoformyl)-L-2,3-diaminopropionate(1-). Dencichine is a haemostatic agent present, it is also a reported neurotoxic agent found in Lathyrus sativus (grass pea seed).