Four new fluorenone alkaloids and one new dihydroazafluoranthene alkaloid from Caulophyllum robustum Maxim

Four new fluorenone alkaloids and one new dihydroazafluoranthene alkaloid from Caulophyllum robustum Maxim Fluorenone alkaloid from Caulophyllum robustum Maxim. with anti-myocardial ischemia activity Caulophyine A, a Rare Azapyrene Alkaloid from the Roots of <i>Caulophyllum robustum</i> Piperidine alkaloids and xanthone from the roots of Caulophyllum robustum Maxim Caulophine Protects Cardiomyocytes From Oxidative and Ischemic Injury Caulophine Protects Cardiomyocytes From Oxidative and Ischemic Injury Cyathocaline, an Azafluorenone Alkaloid from Cyathocalyx zeylanica Five New Alkaloids from the Roots of Sophora flavescens Alkaloids ofHaplophyllum robustum structure of robustine Effects of Caulophine on Caffeine‐induced Cellular Injury and Calcium Homeostasis in Rat Cardiomyocytes