<Tr> <Td> ChEBI </Td> <Td> <Ul> <Li> CHEBI: 17544 </Li> </Ul> </Td> </Tr> <Ul> <Li> CHEBI: 17544 </Li> </Ul> <Li> CHEBI: 17544 </Li> <Tr> <Td> ChemSpider </Td> <Td> <Ul> <Li> 749 </Li> </Ul> </Td> </Tr>

Is sodium hydrogen carbonate a compound or element