Table: radioactivity_data
Columns: 3_h_cft
3_h_nisoxetine
3_h_paroxetine
n_d
s_d

Question: What is the total S ÷ D with a 3298 (1986) [3 H] nizoxetine and an N ÷ D greater than 37.01?
SQL: SELECT COUNT("s_d") FROM radioactivity_data WHERE "3_h_nisoxetine" = '3298 (1986)' AND "n_d" > 37.01

Question: What is the [3 H] paroxetine with a [3 H] CFT less than 3.93, an S ÷ D greater than 1891, and a [3H] nizoxetine of 299 (180)?
SQL: SELECT "3_h_paroxetine" FROM radioactivity_data WHERE "3_h_cft" < 3.93 AND "s_d" > 1891 AND "3_h_nisoxetine" = '299 (180)'

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)?
SQL: SELECT SUM("3_h_cft") FROM radioactivity_data WHERE "n_d" < 393.8 AND "3_h_paroxetine" = '1045 (45)'

Question: What is the highest S ÷ D with a 2420 (220) [3H] paroxetine and an N ÷ D less than 393.8?
SQL: SELECT MAX("s_d") FROM radioactivity_data WHERE "3_h_paroxetine" = '2420 (220)' AND "n_d" < 393.8