(2beta,3alpha)-2,3,22,23-tetrahydroxyergostan-6-one 2-Epicastasterone InChI=1/C28H48O5/c1-14(2)15(3)25(32)26(33)16(4)18-7-8-19-17-11-22(29)21-12-23(30)24(31)13-28(21,6)20(17)9-10-27(18,19)5/h14-21,23-26,30-33H,7-13H2,1-6H3/t15?,16?,17?,18?,19?,20?,21?,23-,24-,25?,26?,27?,28?/m0/s ergostan-6-one, 2,3,22,23-tetrahydroxy-, (2beta,3alpha)-