2H-Pyran-2,3,6-trione, dihydro-

CAS:63408-11-7

Formula:C5H4O4

2,5-Furandione, 3-hydroxy-4-methyl-

CAS:838839-51-3

Formula:C5H4O4

2-Furancarboxylic acid, 4-hydroxy-

CAS:89808-52-6

Formula:C5H4O4

2,4(3H,5H)-Furandione, 3-(hydroxymethylene)-

CAS:220262-26-0

Formula:C5H4O4

2,3,5-Trioxabicyclo[2.2.2]oct-7-en-6-one

CAS:65651-81-2

Formula:C5H4O4

2-Butynedioic acid, monomethyl ester

CAS:42507-71-1

Formula:C5H4O4

4-Cyclopentene-1,3-dione, 2,2-dihydroxy-

CAS:66179-62-2

Formula:C5H4O4

4-Hydroxy-3H-pyran-2,6-dione

CAS:66315-03-5

Formula:C5H4O4

1,2,3-Cyclopentanetrione, 4-hydroxy-

CAS:663177-16-0

Formula:C5H4O4

2,3-Pentadienedioic acid, (R)-

CAS:4457-09-4

Formula:C5H4O4