Scheme 45. Total synthesis of 13-epi-mulinolic acid ethyl ester 209, 13-epi-mulinolic acid 210, mulin-11,13-dien-20-oic acid 211, 13-epi-mulinol 212, 16-hydroxymulin-11,13-dien-20-oic acid 213, mulinic acid 214 mulin-11,13-dien-20-ol 215, 20-hydroxy mulin-11,13-dienyl acetate 216 and isomulinic acid 217.