The isolation and structural elucidation of three new neolignans, piperulins [corrected] A, B, and C, as platelet activating factor receptor antagonists from Piper puberulum.
J Nat Prod. 1995 Apr;58(4):540-7. doi: 10.1021/np50118a009.
J Nat Prod. 1995.
PMID: 7623032