Related Clues:

• Chloroform substitute
• Place to doodle
• Heavens, poetically
• Antiknock additive
• Old-time knockout
• Old hospital supply
• Chloroform cousin
• Upper sky
• Dimethyl ___ (aerosol propellant)
• It can put you out
• Anesthetic liquid
• Erstwhile anesthetic
• Outmoded anesthetic
• Compound number?
• Novocain predecessor