group or class of chemical substances
Deductions
- variable-order class is for example group or class of chemical substances ⇐ (group or class of chemical substances is a variable-order class), (is a is inverse of is for example)
- group or class of chemical substances is for example chemical compound ⇐ (chemical compound is a group or class of chemical substances), (is a is inverse of is for example)
- group or class of chemical substances is for example pure substance ⇐ (pure substance is a group or class of chemical substances), (is a is inverse of is for example)
- group or class of chemical substances is for example mixture ⇐ (mixture is a group or class of chemical substances), (is a is inverse of is for example)