Definition: In this task, you're given a paragraph from the research paper and your task is to generate a suitable title for the research paper based on the given paper. Under 100 words is a good title length.
Input: Chemical compounds studied in this article: Celastrol (PubChem CID: 122,724) triptocalline A (PubChem CID: 44,559,634) polpunonic acid (PubChem CID: 343,427) demethylzeylasteral (PubChem CID: 10,322,911) wilforol A (PubChem CID: 10,096,097) regelin D (PubChem CID: 129,520) triptotriterpenic acid B (PubChem CID: 195,563) wilforlide A (PubChem CID: 158,477) wilforlide B (PubChem CID: 174,362) triptocallic acid A (PubChem CID: 44,575,704) regelinol (PubChem CID: 163,809) regelin (PubChem CID: 163,808) dulcioic acid (PubChem CID: 101,051,955) tripterygic acid A (PubChem CID: 21,672,627) demethylregelin (PubChem CID: 44,559,663) Three new triterpenoids, triregelolides A, B (1, 2), and triregeloic acid (3), were isolated from the stems of Tripterygium regelii along with twenty known triterpene analogues (4-23). The structures of three new compounds were identified by analyzing their NMR spectroscopic and HRESIMS data. Compounds 4, 7, 8, 10, 13, 14, 17, [21] [22] [23] were isolated from T. regelii for the first time. Compounds 3, 5, 6, 8, 9, 10, 14 and 16 showed inhibitory effects on the proliferation of human breast cancer cells MCF-7 by 24.1%, 69.6%, 72.8%, 21.6%, 23.1%, 43.3%, 25.5% and 23.5% (p b 0.05) at a concentration of 10 μM, respectively.

Triterpenoids from the stems of Tripterygium regelii