28541-83-5 2H-1-Benzopyran-2-one, 7-(alpha-D-mannopyranosyloxy)-4-methyl- 7-(alpha-D-Mannopyranosyloxy)-4-methyl-2H-1-benzopyran-2-one EINECS 249-073-2 Methylumbelliferyl-alpha-D-mannopyranoside