2H-1-Benzopyran-2-one, 4-methyl-3-(2-propenyl)-7-(2-propynyloxy)- 3-Allyl-4-methyl-7-propargyloxy-cumarin [German] 4-Methyl-3-(2-propenyl)-7-(2-propynyloxy)-2H-1-benzopyran-2-one 67268-47-7