Deduce the simplified structural formulas of compounds $\mathbf{A}$ and $\mathbf{B}$ in the following reaction.

<MultiModal>![Fig. 1, the figure shows two consecutive steps of reaction. The first step is described by SMILES as: ClC1=C(Cl)C(OC)(OC)C(Cl)=C1Cl.C2=C\CC/C=C\CC/2>>[[A]], the reaction condition is heating. The second step is described by SMILES as: [[A]]>>[[B]], the reaction condition is light irradiation](/media/uploads/86871e19-e573-472b-b4f4-a41f1f69c78a.png)</MultiModal>

There are the following statements:

1.  Molecule $\mathbf{A}$ belongs to the $C_s$ point group
2.  Molecule $\mathbf{B}$ belongs to the $C_{2v}$ point group
3.  Reversing the order of the reaction conditions can also produce the same product in high yield
4.  $\mathbf{B}$ contains 6 rings of six members or less

The following options are all correct and have the largest number of correct statements:
推测以下反应中化合物 $\mathbf{A}$、$\mathbf{B}$ 的结构简式。

<MultiModal>![Fig. 1，图中为连续两步反应。第一步以SMILES描述为：ClC1=C(Cl)C(OC)(OC)C(Cl)=C1Cl.C2=C\CC/C=C\CC/2>>[[A]]，反应条件为加热。第二步以SMILES描述为：[[A]]>>[[B]]，反应条件为光照](/media/uploads/86871e19-e573-472b-b4f4-a41f1f69c78a.png)</MultiModal>

有以下说法：

1. $\mathbf{A}$分子属于$C_s$点群
2. $\mathbf{B}$分子属于$C_{2v}$点群
3. 调换反应条件先后顺序也可以高产率生成同样的产物
4. $\mathbf{B}$中含有6个六元及以下的环

以下选项说法全部正确且正确说法数量最多的是：
All other options are incorrect
1
2
3
4
1,2
1,3
1,4
2,3
2,4
3,4
1,2,3
1,2,4
1,3,4
2,3,4
1,2,3,4
其他选项均不正确
1
2
3
4
1,2
1,3
1,4
2,3
2,4
3,4
1,2,3
1,2,4
1,3,4
2,3,4
1,2,3,4
The first step involves a symmetry-allowed [4+2] cycloaddition reaction under heating conditions, forming the syn-oriented product $\mathbf{A}$, the structure of which is shown in Figure 2.

<MultiModal>![Fig. 2，The molecule in the figure is described in SMILES as：COC1(OC)[C@]2(Cl)C(Cl)=C(Cl)[C@]1(Cl)[C@@H]3[C@H]2CC/C=C\CC3](/media/uploads/ddf9a585-3736-467e-b5d8-a755a76fc363.png)</MultiModal>

<Checkpoint>[Structure of product $\mathbf{A}$: COC1(OC)[C@]2(Cl)C(Cl)=C(Cl)[C@]1(Cl)[C@@H]3[C@H]2CC/C=C\CC3](1)</Checkpoint>

The second step involves a symmetry-allowed [2+2] cycloaddition reaction under light irradiation, connecting the two double bonds within the molecule, forming product $\mathbf{B}$, the structure of which is shown in Figure 3.

<MultiModal>![Fig. 3，The molecule in the figure is described in SMILES as：COC(C(Cl)1C2C3CCC4C5CC2)(OC)C3(Cl)C4(C15Cl)Cl](/media/uploads/9211cabf-90a7-4719-9c9c-7f1621654de7.png)</MultiModal>

<Checkpoint>[Structure of product $\mathbf{B}$: COC(C(Cl)1C2C3CCC4C5CC2)(OC)C3(Cl)C4(C15Cl)Cl](1)</Checkpoint>

Molecules $\mathbf{A}$ and $\mathbf{B}$ each contain only one mirror plane perpendicular to the two double bonds (or single bonds at the original double bond positions) and parallel to the line formed by the two oxygen atoms, and do not contain a $C_2$ or higher-order rotation axis, belonging to the $C_s$ point group; statement 1 is correct, and 2 is incorrect.

<Checkpoint>[Molecules $\mathbf{A}$ and $\mathbf{B}$ each contain only one mirror plane and do not contain a $C_2$ or higher-order rotation axis, belonging to the $C_s$ point group](1)</Checkpoint>

After reversing the reaction sequence, the [4+2] addition reaction is symmetry-forbidden and cannot occur; statement 3 is incorrect.

$\mathbf{B}$ contains three six-membered rings, two five-membered rings, and one four-membered ring; statement 4 is correct.

<Checkpoint>[$\mathbf{B}$ contains 6 six-membered or smaller rings](1)</Checkpoint>
第一步发生加热条件下对称性符合的[4+2]环加成反应，形成同指向的产物$\mathbf{A}$，其结构如图2。

<MultiModal>![Fig. 2，图中分子以SMILES描述为：COC1(OC)[C@]2(Cl)C(Cl)=C(Cl)[C@]1(Cl)[C@@H]3[C@H]2CC/C=C\CC3](/media/uploads/ddf9a585-3736-467e-b5d8-a755a76fc363.png)</MultiModal>

<Checkpoint>[产物$\mathbf{A}$结构为：COC1(OC)[C@]2(Cl)C(Cl)=C(Cl)[C@]1(Cl)[C@@H]3[C@H]2CC/C=C\CC3]](1)</Checkpoint>

第二步发生光照条件下对称性符合的[2+2]环加成反应，连接分子内两个双键，形成产物$\mathbf{B}$，其结构如图3。

<MultiModal>![Fig. 3，图中分子以SMILES描述为：COC(C(Cl)1C2C3CCC4C5CC2)(OC)C3(Cl)C4(C15Cl)Cl](/media/uploads/9211cabf-90a7-4719-9c9c-7f1621654de7.png)</MultiModal>

<Checkpoint>[产物$\mathbf{B}$结构为：COC(C(Cl)1C2C3CCC4C5CC2)(OC)C3(Cl)C4(C15Cl)Cl](1)</Checkpoint>

分子$\mathbf{A}$和$\mathbf{B}$均只含有一个垂直于两个双键（或原双键位置的单键）、平行于两个氧原子形成的直线的镜面，不含$C_2$及以上旋转轴，属于$C_s$点群，说法1正确、2错误。

<Checkpoint>[分子$\mathbf{A}$和$\mathbf{B}$均只含有一个镜面，不含$C_2$及以上旋转轴，属于$C_s$点群](1)</Checkpoint>

调换反应顺序后[4+2]加成反应对称性禁阻，无法发生，说法3错误。

$\mathbf{B}$含有三个六元环，两个五元环，一个四元环，说法4正确。

<Checkpoint>[$\mathbf{B}$含有6个六元及以下的环](1)</Checkpoint>