arteether [ SM-227,arteether, (3R-(3alpha,5abeta,6beta,8abeta,9alpha,10alpha,12beta,12aR*))-isomer,arteether, (3R-(3alpha,5abeta,6beta,8abeta,9alpha,10beta,12beta,12aR*))-isomer,artemotil,artether,beta-artether ] structure given in first source; RN given refers to cpd without isomeric designation