Dimethyltryptamine analogues as nitric oxide delivery drugs

A method of treating a mental health disease or disorder, the method comprising administering to a subject in need thereof a compound of Formula (II):

• or a pharmaceutically acceptable salt thereof;
• wherein,
• R3, R4, and R5 are independently H, halogen, or C1-C6 alkyl;
• R6 is —(C═O)(CR7R7′)n—ONO2, or —(C═O)(CR7R7′)m—CH(NH2)CH2ONO2;
• R1 and R2 are each independently H or C1-C6 alkyl;
• and
• R7 and R7′ are independently H, halogen, or C1-C6 alkyl;
• X, Y, and Z are independently absent or O;
• m is 2, 3, or 4;
• and
• each n is independently 1, 2, 3, 4 or 5.