1407-11-0 481-05-0 Artemisin Naphtho(1,2-b)furan-2,8(3H,4H)-dione, 3a,5,5a,9b-tetrahydro-4-hydroxy-3,5a,9-trimethyl-, (3S-(3alpha,3aalpha,4alpha,5abeta,9bbeta))-