Artemisinic acid80286-58-4100 % similar Dihydroartemisinic acid85031-59-054 % similar Valerenic acid3569-10-637 % similar Costunolide553-21-934 % similar Perillic acid7694-45-331 % similar 3a,4,5,7a-Tetrahydro-6-methyl-1,3-isobenzofurandione19438-64-331 % similar