user: Question: What is the sum of the [3 H]CFT with an N ÷ D less than 393.8 and a [3H] paroxetine of 1045 (45)?
Columns: ['[ 3 H]CFT', '[ 3 H]Nisoxetine', '[ 3 H]Paroxetine', 'N ÷ D', 'S ÷ D']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [89.1, '3298 (1986)', '1045 (45)', 37.01, 11.79]
SQL:

assistant: SELECT SUM("[ 3 H]CFT") FROM "Table" WHERE "N ÷ D" < 393.8 AND "[ 3 H]Paroxetine" = '1045 (45)';