Natura - nature Status: extant actualia - actual entities Status: extant Mundus Plinius - physical world Status: extant naturalia - natural bodies Status: extant "crystal-kingdom" Status: extant chemical substances Status: extant chemical compounds Status: extant Class carboxylic acids - RC(=O)OH Status: extant acetic acid derivatives Status: extant diclofenac - C14H11Cl2NO2 Status: extant