19β,28-EPOXY-18α-OLEAN-3β-OL

The title triterpene, C30H50O2, is an 18α-oleanane derivative prepared by the Wagner–Meerwein rearrangement of betulin with Bi(OTf)3.xH2O (OTF is trifluoromethanesulfonate).There are two symmetry-independent molecules in the asymmetric unit that show no significant differences concerning bond lengths and angles.The conformation o

Headwear In men, vaginal hydrocele is the most common morbidity due to Wuchereria bancrofti.Diagnosis is straightforward most of the time but when the swelling is not transilluminant, patients in whom the diagnosis is in doubt, children with hydroceles and those with co-morbid conditions should have ultrasonography to differentiate these swellings.